Can I make a Full access user see qoutation in his group only

Can I make a Full access user see quotation in his group only whenever I use the forwarding rules the full access users can see all the quotations when they are not in the group is it some thing wrong in the code or is it somewhere else

resulstr = "";
approver = "";
approver1="";
if( find( _system_user_groups, "parts")<> -1){
approver = "parts"+"~" +_system_company_name+ "~Admin|";

}
if( find( _system_user_groups, "equip")<> -1){
approver1 = "equip"+"~" +_system_company_name+ "~Admin|";

}
resulstr = approver + approver1 ;
/* Print and return the final result */
print resulstr;
print _system_user_groups;
return resulstr;