you designate an MPOE (minimum point of entry) and then have cabling/conduit installed from the MPOE to units/residences/NIDs. then your HOA owns the "inside wiring" and, with the right amount of lawyer magic, each unit can own/control the destiny of the cable/wire/conduit that goes from the MPOE to them.

then the real trick is getting the ISP you want to play ball. I know of a few instances where Comcast just won't entertain the setup whatsoever. Unfortunately, in telecommunications, largess is the name of the game...