Allen,
Thanks for your feedback. Currently I'm using Case statement with a function to see if the computer belongs in a specific group and if it does, do some stuff. Would it be possible to modify my existing Case statement and include @USERID piece without breaking the script.
Below is part of my script...

Select
Case ComputerInGroup("Admin") = 0 and (@userid = "Gen1")
AddPrinterConnection("\\PRINTSERVER\HP PRINTER")
EndSelect

So can I modify my statement to this and would it still work properly?
Select
Case ComputerInGroup("Admin") = 0 and (@userid = "Gen1")
AddPrinterConnection("\\PRINTSERVER\HP PRINTER")
Case @userid = "Gen2"
AddPrinterConnection("\\PRINTSERVER\HP PRINTER2")
EndSelect