I think dividends could only come from Citi, not from an investor; and part of the original deal was a limit on dividends, presumably for the sake of preserving a semblance of moral hazard in the course of a massive bailout.
I think you are misinterpreting. The taxpayers are the investors, and the government is holding these (imaginary after we pay for 300 billion in failed mortgages) profits. The poster wishes these profits by the government, which taxpayers have invested in, to be payed out as dividends (tax refunds)
So "shareholder" doesn't mean Citi shareholder but rather taxpayers, and "dividends" doesn't mean dividends to Citi shareholder but tax refund to me. In that case, I share the wish, and admire the irony.