I'm using the thumb rating system instead of the stars. However there are no restriction settings available for thumbs, only for stars. I found a forum post saying that the restriction settings are copied from stars to thumbs though.
I'm using the RPX plugin to let users login my site using openid, facebook, linkedin and twitter. Now if a user logs in with all these sites, they can vote 4 times.
How to prevent this?
PS. I tried registering for the gdragon forum, but the activation mails are never sent.