technically you can only vote trudeau in the papineau district and there is a chance trudeau might lose there. if you live there around the center of the island of montreal i highly recommend voting ndp even if you don't like the ndp since they seem to be the current second place party there and trudeau is currently only leading 33% to 30% with a 7% margin of error for both, so there is a chance he could lose his district.  
Canada