Multiplayer Variables Travel Between Levels

Hello guys,

I am having some problems with the save game.
i need to travel some variable from a level to another. In the lobby we all select our name and it is working fine, but when we go to the next map, all the player have the info from the servers save game.
How can every player access his own save game slot?

The logic here would be: when a player connects, he extracts the datas from his save game locally and he sends them to the Server (and not the other way around).