All you need to do is entitle the same user to multiple groups. The problem that you will have with the Wyse V10L is that it doesn't support multiple assigned workstations. Well, I'm running the latest firmware from Wyse on our V10Ls and it's not working. I am dealing with Wyse

on this issue as they had mentioned it should work.

To confirm simply access the web interface or load the View Client on a Windows PC and you'll see all machines the user is entitled to use.