Nope it won't be able to populate itself into the WINS, because that would require broadcasts (which won't pass through the router). However, PC03 could still do lookups directly on the WINS, if you point it there, because then that'll be regular unicast traffic, which will route through the router successfully. Also, you could manually add an entry for PC03 in the WINS server, and then the other OCs will be able to find it too. I hope that makes sense.