Here is an example on how to use the group membership for a computer to control Default Printer

; Mapping Printers

; Deleting printers

$result=DelTree("HKEY_CURRENT_USERPrintersconnections")

; Adding Printers

$result=ADDPRINTERCONNECTION ("\Server01Printer1") 
$result=ADDPRINTERCONNECTION ("\Server01Printer2") 

AT (16,21) "Setting default Printer...        "

If ComputerInGroup ("Group1") = 1 
    $ = SetDefaultPrinter ("\Server01Printer1") 
EndIf 

If ComputerInGroup ("Group2") = 1 
    $ = SetDefaultPrinter ("\Server01Printer2")
EndIf 

; ***** UDF ComputerInGroup ***** 

Function ComputerInGroup($group,optional $Domain) 
   Dim $oGrp 
   if not $domain $domain=@domain endif 
   $oGrp = GetObject("WinNT://" + $domain + "/" + $group + ",group" ) 
   if @error exit 1 endif 
   if $oGrp.IsMember("WinNT://" + $domain + "/" + @wksta + "$$" ) 
      $ComputerInGroup=1 
   else 
      $ComputerInGroup=0 
   endif 
endfunction 

Links

http://www.adminscripteditor.com/forum/tm.asp?m=10925