Feature request: Able to make RS network private.

While playing with my friends is fun, I am terribly paranoid and I wish I could make my Refined Storage network private to only me or being able to allow a few other chosen users access. Mostly I want this because I'm paranoid, but also because some of my friends have the tendency to "borrow" items without asking me, which I don't like at all.

It would be nice to be able to make a network private to one or more players, maybe by specifying the player name?

Hopefully this is feasible in some way without having to do a major rewrite of code.

duplicate of #1148