Again, this isn't really a solution, but you could use a different coloured cable between each P2P linkage? Would that help?
that might get really messy though if you've alot of cables going around, and I'm already not that great at using channels from AE2, so if I were to use color coding like that I think I might even understand less from the channels
but I just don't understand why they haven't added the option of marking your P2P tunnels yet, seeing as P2P tunnels are used so much in AE2