ID:172918
 
Meaning... I have a multi player game. When a player enters z level 7, they are presented with a fresh copy of the level and no other player can join or touch this players "copy" of the level. Each player should be able to interact and change objects on this level without affecting the other players objects. Players should be able to move in and out of this z level at will and all the object states are saved.

tsfreaks
I believe Lummox JR's nifty SwapMaps can help you create something like this.

I personally haven't got around to seeing how it works, or to using it, but read the documentation and I'm sure you will be able to create what you're after. Good Luck.