Is it now compatible with the "Post Ratings" Addon by Luke F?
Compatible at here ... what do you mean ?
I mean, that it could limit all ratings, not only the "likes".
With "Post Ratings" you can add additional ratings (positive, negative, neutral and uncounted).
Last time I tried your addon, it limited only the ratings which where configured to be the equivalent of the "normal" likes of xenforo.
I'm regret to tell you that this add-on doesn't support to limit ratings from Post Rating add-on.