From Unofficial Ansalon Wiki
The clan of the 7 Kingdoms isn't so much a clan, as a gathering of all
the loyal and proud Dwarves of Ansalon under one banner. It doesn't matter
what you do, or who you are, as long as you are a Dwarf you can be part of
the Seven Kingdoms. All members of the 7 Kingdoms clan are proud to be
Dwarves, and they're proud of Thorbardin, their underground kingdom.
In OOC terms:
Player can follow any god or religion.
Player can be ANY class.
Player must be a dwarf.