Can't see why that would be an issue, as I'm pretty sure N7s bought in the US are actually setup to cover N American market (ie not specific to the USA), UK market, and maybe elsewhere too (can't remember what other countries appeared in setup list now, obviously just wanted to make sure UK would be OK).
At first setup screen I had the UK as country option in the list, so can't imagine why Canada wouldn't be there.
Maybe someone who purchased in Canada could check on whether US and UK are also options in country setup, to confirm it does cover the same market areas?