If you're looking for static IPs as you can do with the other Remote Access methods, that's not possible. There are workarounds - what problem are you trying to solve?
That said, I think there's something in the V9.1 beta that you might be able to use. It looks pretty rough at the moment though.
Cheers - Bob
Sophos UTM Community Moderator Sophos Certified Architect - UTM Sophos Certified Engineer - XG Gold Solution Partner since 2005