YUL MLL access before Y flight with C ticket for flight later in the day
I will be connecting through YUL on an AC Y ticket in the morning and a second time on an AC C ticket in the late afternoon. As I have a 2hr layover in the morning: Can I present my boarding pass for my later (intl) business class departure to get access to a MLL in-between my (dom) Y flights in the morning, sort of pretending that I arrived 8 hours before departure of my intl flight? Or is the system smart enough to see when scanning the boarding pass that I am transiting on an Y booking at that point that should not give me access to the lounge?
On a more practical level as I have never been there: How is the terminal layout at YUL? Can I get into any MLL with my boarding pass for an intl flight, i.e. also the one nearer to the domestic departures? If not, would I be "trapped" in int'l departures and unable to get back to domestic depatures if I went to the intl MLL?