Code:

If Not @TSSESSION
	$ComputerName = @WKSTA
Else
	$ComputerName = %CLIENTNAME%
EndIf
Select
	Case Left($ComputerName,2) = "FA"
		$ = AddPrinterConnection("\\Server\PrinterA")
	Case Left($ComputerName,2) = "FB"
		$ = AddPrinterConnection("\\Server\PrinterB")
EndSelect