Hi, I just committed a new group feature: so far we have group support with fixed matching: user X belongs to group G; the new regexp support allows you to fetch all the groups for which the user matched a RE (if the URI match the Re, means the belongs that group). See http://www.openser.org/docs/modules/1.1.x/group.html Application example: imagine you have routing point between several termination points (gateways, media servers, application servers, etc) and you have large blocks of numbers/users (K or 10K order). you know that certain range of users must be routed to specific destinations. So use RE based groups to define the range of users -> flexible and scalable routing and simple to provision. regards, bogdan