How can determine the guid of a Netremote client when it sends command?

I have been running a single client via RDP for some time now but would like to start running more clients under RDP but I need a way to send events to different copies running on the same server (differnet logins). I was able to use the IP address with PDAs but since they will all have the same IP under RDP I can't figure this out!

I see the guid when the Client registers with Girder and can drill down to it in variable inspector but can't figure out how to determine the guid upon a incoming event.