Yes, Vertigo can use Groupwise Variables which allow rules to change based on the account they are applied to.
The following is a step by step guide to setting up a rule:
1) Add the rule to a user in your Groupwise system (open groupwise and login to a users account) click on tools | rules | new | specify name and options | add an option (note: This is where you will want to enter your Groupwise Variables, (list at bottom)) and save.
2) Next open vertigo | conect to groupwise system | select user that you applied the rule to | click on the rules tab (you may have to scroll right).
Select the rule you want to copy to another user | click copy | select users to receive rule | click ok | close the copy window when complete | check user rule was copied to, in order to verify the variable changed.
List of Variables that can be used in a rule:
UserID = the Mailbox name from the selected user in the address book
EmailAddress = the email address from the selected user in the address book