TechTO is great, but it’s so big that I’m not sure of it’s networking value.
There are Meetups almost every night of the week where you can focus on the particular areas you are interested in exploring. So check those out and reach out to the organizers.
Access the MaRS job board to see who is looking for folks, as well as AngelList. And get on their mailing lists.
As for contact info, I agree that a US number is fine, and try to be as contactable as possible.
Think of this from the “customer” point of view. How would you want someone to position themselves if you were looking for an awesome Product Manager.
Finally, if you are looking for Product Management positions, The Toronto Product Management Association has more established company connection, but ProductTank, ProductTO and such have a more start-up vibe.
Hope that helps.