Playing For Others

In several of the games that I'm currently active in there have been chat announcements stating (to the effect) "Player X is in for Player Y." Isn't this tantamount to a violation of the multiple account rule?
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Conquer Club, a free online multiplayer variation of a popular world domination board game.
http://www.tools.conquerclub.com/forum/
http://www.tools.conquerclub.com/forum/viewtopic.php?f=6&t=123045
Pyradonis wrote:Ok, I´ll keep that in mind!^^