Multi User Editing

Hey guys,
I hope each of you know the update we talk about, the 4.22
And I have some Questions about it, or kind of more about a Plugin: Multi User editing
You can work with your friends together, but when? do you need to be in the same Lan as I read kind of often?
Then how to do that Zeroone and Hamatchi wont work for me, I dont know why…?
Thx for your answers ;D