Ah, Jakandor, I'd completely forgotten about that one, time for a wiki binge.
What worlds does Lolth control, or where could I read more about that? I initially thought of the worlds behind the gates in Queen of the Demonweb Pits, but those worlds are under invasion by Lolth rather than controlled by her and priests on those worlds can access their own gods just fine.
A triumvirate of gods is pretty close. Do you happen to remember which Dungeon issue that was, or a name I could search for?