We have an ASA5510 which we need send 12 Multicast through.  I am using igmp join-groups on the OUTSIDE interface so that it will forward the packets.  Occasionally we need to limit some of the groups because its private video. I have tried setting up outbound filters with the specific MC groups that I would like to deny out andt hen applying it to the interface, but it doesn't seem to have any effect.  The only think I have found that works is either addign or removing the igmp join-group statements from the interface - which stops those groups from going outbound.

Is there anyway to use access-lists or filtering to restrict certain groups from being forwarded?

thank you

LMCO