When adding channels to your favorites, you can specify which network(s) you want the addition associated with.
By calling up the favorites list, then highlighting a channel, you can edit the settings for that favorite, including which network(s) that favorite is associated with.
 
Yeah I tried that but it never gives me options. It only gives the option of "All Networks". I tried adding servers from the "options > servers" window but they still don't show.