We are working on implementing Quarkcoin.
If you have 2 wallets (that means you see 2 wallets on the left bar with the "New Wallet" button below it) you can choose which wallet you want to send the coins from.
Wow! This is exactly what I need. If this feature would work with Quark this would be absolutely awesome(!) because then I could keep the Business account completely separate from my Personal Quark funds. Really looking forward to Quark implementation. Thanks!