[support] Field separation issue on registration page using domain access

Dear all, I am working on drupal 7 site in which two domains are running. I am using domain access module for it. On both domain there is different registration form and I have created field using profile module, but on both domain same fields are showing on registration form and same validation . Please guide how can I separate fields for both registration. Moreover I want validation for each field one by one using better messages, currently showing all validation at once. Thanks, Rakesh Kumar