P2P clients in general aren't included within VSE. You can create user-defined PUPs to remove the executables. That's included with VSE.
If you are trying to tackle the issue of P2P this is really something you should block with a network security appliance. This is really something trivial to block at a protocol level on the network.
Then why is there a threat type "P2P Client" by default?
User defined PUPs is not a real options because it works on file name and there are too many different flavours and some of our users are smart enough to bypass this (renaming).
And a network appliance doesn't block our laptop users working at home which is a risk (download mallware from home outside office hours and bringing it into our network when they plug in their computer into our network)