I don't understand if Proxy SSO plugin is for my need, I must track login from different subdomains and domain name, I activate the multi site system and unique users tables, I want can use different domains and subdomains of my system.
for example I have 3 sites:
1) q2a1.domain1.com
2) q2a2.domain1.com
3) q2a1.domain2.com
