There is some sort of a global "player id" that identifies you to Minecraft servers. This id has a 1:1 relationship with a game state on a server. Is it possible to get a new game on a server without getting a new id (without buying a new copy of Minecraft)? This would make it possible to start from fresh on a server one doesn't control.
I think that the whole idea of there being a single game state associated with a single user id is, on its face, absurd. When you play locally, you can have as many games as you wish. The same should be possible on a server. I have no problem with having a unique id so that someone can ban me etc. I just wish there was a way to have more than one game state (player state) on a server, so that I could explore different strategies etc.
My question is not about impersonating another player, nor avoiding bans, etc. I simply wonder why online play limits the functionality present in the basic local Minecraft – namely that you can have more than one game state.
Best Answer
That would be very bad, if it would be working. It is of course not working. The game is linked with you account and it is not possible to change that.
The ID was earlier your in game name. With your name you will be identified from the servers. The name is not changeable in an easy way. The only way is to contact the support (but they wont change it).
Now it is working with a unique ID (v1.7.6). Means you are able to change your name but not your ID.
from mojang
The reason why you cannot change your ID is because server owner have a problem to identify you. Means if you are banned from a server, you should be banned and not have a chance to join.
Answer for your edited question:
The functionality on a server is basically the same as on a local game. You actually can not have more "games", but you can have more worlds! On a Server it is exactly the same (if the owner has build it like so). If the server owner has nothing edited and just has a bunch of different maps, you have a "new game/status" on every map. There is nothing limited.
Anyway the chance that there is a server that is build up like that is very low, because everyone wants to keep his items and build just one house and that on just one map. If there are more than one map it is likely a mini game map, pvp, skyland or whatever.
There is no possibility (legal and playable on all "online" servers) in any way to get a new status/"game" on a server by changing anything at your client or on your account.
The only way is to ask the server owner to delete your user data from the server.