BO User Groups based on Extended LDAP User Attributes

Hello Experts 

I have configured LDAP with Business Objects. As a part of configuration I also imported additional/extended user attributes ( Country). Using SAP Note - 1880091.

I need to know how I can create Business Objects Users group based on extended attributes ( for example Country).

So i would have all country specific users in one group in business Objects.

Please help.

Thanks

R