That looks like a modified version of the default IGMP rule, which is active on all three profiles and is less restrictive, in terms of destination. For the most part, unless you have a specific need to support inbound IGMP announcements, you can block them. 126.96.36.199, which is simply an 'All Hosts' or link Local Multicast, announcement and essentially unneeded. 188.8.131.52 is for Link-local Multicast Name Resolution, so unless you're supporting IPv6 it's not going to be a lot of use. 184.108.40.206 is connected with SSDP and UPnP, it might be useful if you have a need for such services, of you use something like Media Centre.