How to send custom info to Win32_processStartTrace events

Question

I'm writing an application that monitors process start and process end for a list of processes I'm interested in. Since Win32_ProcessStartTrace doesn't have a processpath, I'm filtering my events based on processName. Once an event arrives, I want to do a further check using the processPath, to make sure I have caught the right application, and avoid any false positives. How do I get the processPath I'm interested in into my StartProcess_EventArrived method? I have the path before the event is raised, but not when the event arrives. I'm aware of using __InstanceCreationEvent which will allow me to filter on processPath, but I don't want my application to consume CPU because of this being an intrinsic event.

 void WaitForProcess()
{

    var notePadpath = "C:/users/notepad.exe";
    ManagementEventWatcher startWatch = new ManagementEventWatcher(
      new WqlEventQuery("SELECT * FROM Win32_ProcessStartTrace where processname = "notepad.exe""));
    startWatch.EventArrived
                        += new EventArrivedEventHandler(startWatch_EventArrived);
    startWatch.Start();

}

// How can I extract the path of my application in the below method? I don't want to use a global variable.

  void startWatch_EventArrived(object sender, EventArrivedEventArgs e)
        {
                try
                {
                    using (var searcher = new ManagementObjectSearcher("SELECT * FROM Win32_Process WHERE ExecutablePath = " + notePadpath))
                }
            
        }