The man who has just been promoted to national manager of IFR (as in, everything except tower) training has also been given a few extra roles, including "managing" the experienced controller recruitment program. He has never been a fan of the scheme and will likely let it melt away. Last I heard is that website applications are almost never checked, and now they're claiming that foreign applicants will have problems with security clearances.
In any event, no one can say what the situation will be in 5 years, or even 2 years, time so there's very little point banking on Nav Canada hiring foreign recruits in years to come.
Note that if you do get hired by them as an ab-initio IFR trainee, you'll have to pay for your course (it was 6 months of basic course, now 40 days...) and then will be unpaid until reaching live training. Given the constant course redesigns at one of the centres, and the consequent holding for a course to actually start, that can be a loooooooong time before a salary gets paid.
Jerricho can fill in the blanks!