return user group information to radius client

Hi I am trying to create three groups of users. I want to restrict access to functionality based on which group the user is in. For this i need to get this group information in the radius client also. Is there some standard way of telling the client that this user belongs to this group.If so how do i set this on the radius server. please help. thanks, ganesh ____________________________________________________________________________________ Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com