I think the only chance you have is to use the pywin32 extensions and ask windows yourself.
Basically you look on msdn how to do it in c++ and use the according pywin32 functions.
from win32security import GetSecurityInfo, LookupAccountSid
from win32security import OWNER_SECURITY_INFORMATION, SE_FILE_OBJECT
from win32file import CreateFile
from win32file import GENERIC_READ, FILE_SHARE_READ, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL
fh = CreateFile( __file__, GENERIC_READ, FILE_SHARE_READ, None, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, None )
info = GetSecurityInfo( fh, SE_FILE_OBJECT, OWNER_SECURITY_INFORMATION )
name, domain, type_id = LookupAccountSid( None, info.GetSecurityDescriptorOwner() )
print name, domain, type_id