Connecting to Hero Lab Portfolios containing multiple heroes

[Paris.Crenshaw]

When connecting to a Hero Lab portfolio, does each portfolio have to have only one hero in it, or is there a way for an entity's entry in Realm Works to reference a specific hero within a larger portfolio? I know that I could open it externally, but I'd like to be able to use a few consolidated portfolios, while still having the statblock show up correctly in Realm Works.

Thanks!