LND said all that need be said:
The rules and TOS specifically say you can't use multiple accounts in any way that gives you a competitive advantage over other players or gets you more coins, and using two accounts in CW would definitely be a violation of the competitive advantage rules...
It doesn't need to be explicitly stated in CW (although it seems that it is now) b/c it's an inherent violation of the TOS. It's both a competitive advantage and coins + WZI rewards are involved, so it's obvious. Why even ask?