VB.NET禁止同一用户启动相同的进程（同一进程允许多个用户运行情况下）

Function PrevInstance() As Boolean
        Try
            Dim PROC As Process
            Dim intProCount As Integer = 0

            PROC = Diagnostics.Process.GetCurrentProcess

            If UBound(Diagnostics.Process.GetProcessesByName(PROC.ProcessName)) > 0 Then
                Dim Processes As New Management.ManagementObjectSearcher("SELECT * FROM Win32_Process WHERE Name = '" & PROC.MainModule.ModuleName & "' ")
                Dim Process As Management.ManagementObject
                For Each Process In Processes.Get()
                    Dim OwnerInfo(1) As String
                    Process.InvokeMethod("GetOwner", OwnerInfo)
                    If OwnerInfo(0) = System.Environment.UserName Then
                        intProCount = intProCount + 1
                        If intProCount > 1 Then
                            MessageBox.Show("该用户下的该进程已经启动。")
                            Return True
                        End If
                    End If
                Next
                Return False
            Else
                Return False
            End If
        Catch ex As Exception
            MessageBox.Show(ex.ToString)
            Return True
        End Try
    End Function