Hi,
It’s been a while since I worked on it, but if my memory serves me right I had to create rule & then set the active directory response to give back username & group as it was my claims provider. It’s little complicate to use SSO with wordpress if you’re using AD as your CP, as SSP to WP communication is tricky. Have a look at this link: http://stackoverflow.com/questions/36063821/wordpress-single-sign-on-using-ssp-and-adfs-as-idp-proxy.
It might be of help in setting up claims rules.
