which commands are Powerfull to limit JOIN On certain routers
ip igmp profile 1
Range 126.96.36.199 188.8.131.52
ip igmp filter 1
Via a Normal access-list
If you are asked to limit joins, you need to use ip igmp profile on switches and ip igmp access-group on routers.
Normal ACLs block the traffic for those multicast groups but does not filter the join.