{HEAD ~ A discrimination mechanism} determines {TAIL ~ the location} of a user with respect to categories of a security policy, such as to distinguish local users, intranet users and dial up users from one another 
determines
{ HEAD ~ A discrimination mechanism } determines { TAIL ~ the location } of a user with respect to categories of a security policy , such as to distinguish local users , intranet users and dial up users from one another
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH