User Modification Template

User Modification Template

Is there a way to do a User Modification Template for multiple domains.

USE CASE: As a multi-domain forest, we put certain groups (ex. VPN) in the root domain. I need to assign that group to a user in the child domain.

However, when trying to assign that VPN group (that is in the root domain) to a user (in the child domain) I can't find that group.