First you need to make sure that you have multiple games enabled in your settings. To do this, click on "settings" in the upper right hand corner of your screen then in the box that appears go to the sub tab "play" and check the "play multiple games at a time" box. In live chess, one way that you can play multiple games is by starting a new game using the "new game " tab, then once that game is started and you have made your first move (the server will abort your game if you don't make your first move within 15-20 seconds) you can once again use the new game tab and create another game !
Hopefully that helps you out.
How can I play multiple games? Do you have to create all games separatly or there is faster way?