How do I disconnect from LOCAL remote app only, secondly how do I exit a application on LOCAL remote desktop only?

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C#

I'm using the following code to kill a remote desktop session and the application running in it. It works fine, the only problem is that it kills the specified server of the application for all users.

How do I keep this to just the local machine running a session?

We have multiple users logging in and running this application from a server on their local machines. Most are running using work resources, but some use remote desktop.

No matter how they are logged in when I run my code all users loose their sessions.

private void btnCloseSession_Click(object sender, EventArgs e)
    {
        if (!runningExclusiveProcess)
        {
            runningExclusiveProcess = true;
            btnCloseSession.Enabled = false;
                //check and close Labware if running
                if (chkCloseLabware.Checked == true) 
            {
                if (chkExit.Checked == true)
                {
                    KillLabWare();
                    Close();
                }
                else
                {
                    KillLabWare();
                }
            }

            Process[] my = Process.GetProcessesByName("mstsc");

            //loop thru list to get selected item(s)
            ListBox.SelectedObjectCollection selectedItems = new ListBox.SelectedObjectCollection(lstOpenSessions);
            selectedItems = lstOpenSessions.SelectedItems;

            try
            {
                //remove credentials
                string szTestx = "/delete:XXXX.NET/" + cboServer.Text;
                ProcessStartInfo infox = new ProcessStartInfo("cmdkey.exe", szTestx);
                Process procx = new Process();
                procx.StartInfo = infox;
                procx.Start();

                if (lstOpenSessions.SelectedIndex != -1)
                {
                    for (int i = selectedItems.Count - 1; i >= 0; i--)
                    {
                        //loop thru process to match process vs. list selection(s)
                        foreach (Process remote in my)
                        {
                            if (remote.MainWindowTitle == selectedItems[i].ToString())
                            {
                                KillRS(remote.MainWindowTitle);
                                lstOpenSessions.Items.Remove(selectedItems[i]);
                            }
                        }

                        if (lstOpenSessions.Items.Contains(selectedItems[i].ToString()))
                        {
                            lstOpenSessions.Items.Remove(selectedItems[i]);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("{0} Exception caught.", ex);
            }
            // If your task is synchronous, then undo your flag here:
            runningExclusiveProcess = false;
            btnCloseSession.Enabled = true;
        }
    }
    public void KillLabWare()
    {
        ConnectionOptions con = new ConnectionOptions();
        con.Username = cboUserName.Text;
        con.Password = txtPassWord.Text;
        string strIPAddress = cboServer.Text;

        ManagementScope scope = new
            ManagementScope(@"\\" + strIPAddress + @"\root\cimv2", con);
        scope.Connect();
        ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_Process WHERE Name='Labware.exe'");
        ManagementObjectSearcher searcher = new
            ManagementObjectSearcher(scope, query);
        ManagementObjectCollection objectCollection = searcher.Get();
        foreach (ManagementObject managementObject in objectCollection)
        {
            managementObject.InvokeMethod("Terminate", null);
        }
    }
    private void KillRS(string rwt)
    {
        foreach (Process p in Process.GetProcesses())
        {
            if (p.MainWindowTitle == rwt)
            {
                p.Kill();
            }
        }
    }
    public static void KillRemoteProcess(Process p, string user, string password)
    {
        new Process
        {
            StartInfo = new ProcessStartInfo
            {
                FileName = "TaskKill.exe",
                Arguments = string.Format("/pid {0} /s {1} /u {2} /p {3}", p.Id, p.MachineName, user, password),
                WindowStyle = ProcessWindowStyle.Hidden,
                CreateNoWindow = true
            }
        }.Start();
    }

What I have tried:

I have tried the above code and tried changing the scope of the query.

Also posted this on Stack Overflow, with no response.