For properties that are bank owned, the bank isn't actually the one responsible for selling it. Banks hire Asset Management companies to dispose of their properties. These Asset Mgmt companies are the seller & as such hire REALTORS to list the properties.
But in this case for this property, it's a short sale. The only people to know for certainty who owns the mortgage note will be the listing agent, your buyer's agent, the seller & the mortgage servicer (who could also be the one who owns the note). For this property, Citibank is the bank that is foreclosing with $589,500 owed to them and an auction date of 2/17/2009. But you will not be able to speak directly with the bank to get any information from them because the bank is not allowed to tell you anything. The seller has to give written permission to the bank allowing you to get access to information. But you still have to have a purchase agreement with the seller to buy the property, even in it's pre-foreclosure stage. The bank won't deal directly with a home buyer without the seller's permission.
You'll be best served by allowing a buyer's agent to assist you through the complicated ordeal of buying a home.