directory

We are building a social network with wordpress and buddypress. We have installed membership plugin. Does directory plugin work with membership and buddypress together? Or, even if I have buddypress will it work through wordpress only? The reason I ask is that we have a social network that we would like to add a separate business directory to. Local businesses can pay to be listed in this directory. However, we would like a separate log in and registration for the directory which (log in) should not be seen by our social members. Social members should only see the directory and be able to make comments. Is this possible?