Help with different lenders on the same property

I am looking for advice and direction on a possible deal.

I found a fourplex listed on the MLS, it is a bank owned property. After looking into the property further I realized it is part of an apartment complex that consist of ten identical fourplexes and all of them are empty. I spoke with the listing agent and she informed me that all she knew was that a single person owned all of the apartments, but had different lenders for each individual fourplex and that all of them were in different stages of foreclosure.

I am very interested in this deal if there is anyway to purchase all of the fourplexes. So my question is, what is the best way, or is it even possible to find out which lending institution owns what and where it is in foreclosure? Or is it even worth the effort?