I have a doubt about the design of the engine of poker:

When a player creates a game on a server on the Internet, who is charged with administering the game, the user is the main server and Internet server acts as a bridge, or is the server that manages the Internet really heading?
I am making some modifications to the game itself, and I want to make the games can be created on the server side and not the user is to make the game play, would that be possible?
Of course once it publishes the finished version, based on its super game of poker.
Thank you and sorry by my English, which is not so good.