Yep, easy, assuming you're talking about online games, not live. You can manually claim victory for each game, if you you want to. The link "Offer draw" on the right site under the moves window will change to "Claim victory on time". Until you click on that link, the game will be stalled and you can wait for your opponent to come back.
Auto-Win on Time
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So at first my auto-win on time was checked but I realized it was better to uncheck it. Because I may win some game because of time out and improve my rating which is great but in the end it won't help me improving my game.
And now it's becoming more complex than that:
There are some games that I want to end as this one
http://www.chess.com/echess/game?id=62632982
and some others that I don't as this one
http://www.chess.com/echess/game?id=62608412
Isn't there any way to claim victory on some game and let the others continue until my opponent makes his move?
Also, the first one isn't ending even with auto-win on time checked. What should I do? Should I click on abort? Isn't it going to be a problem if I do that too often? Is there some fairplay regulations as in live chess?