As long as the transborder flight to/from Canada is a P/A/G FC fare, one would get lounge access even without DL status. Only the Caribbean is excluded for international lounge access. While the over ocean flight on Premium Select is always a P/A/G fare, based on some trial bookings, it looks like the domestic connecting flights of Premium Select fares can sometimes book as FC (P/A/G) fares and sometimes as C+ (W) fares. A Premium Select fare on it's own does not entitle one to lounge access (only D1 fares provide that).