How Google Webmasters tool track / treats sub-domain?

If we syndicate main domain with Google webmaster tool, it treats subdomain traffic  as internal traffic that maps to main domain. But it is Google Webmaster Toolnot possible to handle sub-domain pages from main domain section (blocked URLS -like disallowing url's through robots.txt,URL Parameter handling – Handle webpage with same content with Multiple Parameter)  in Google Webmasters tool. To handle sub-domain we need add sub-domain seperately.