Alright mitsho, 4th & 5th place finishes for Canada (I included 5th because a lot of Canadians lament the 5th place finishes as much as the 4th place). I think that's all of them, but it's possible I missed one or two.
4th place:
men's short track 1500m, Olivier Jean
men's moguls, Vincent Marquis*
ladies' short track 500m, Jessica Gregg*
ladies' 1000m, Kristina Groves*
men's short track 1000m, Charles Hamelin
men's ski cross, Crhis Delbosco
men's team sprint free, Canada (x-country ski)
5th place:
ladies' moguls, Chloe Dufour-Lapointe*
ladies' 3000m, Clara Hughes*
men's moguls, Pierre-Alexandre Rousseau*
men's downhill, Erik Guay
men's snowboard cross, Robert Fagan*
men's figure skating, Patrick Chan
men's super-G, Erik Guay
ladies' skeleton, Melissa Hollingsworth
men's 30km pursuit, Ivan Babikov (x-country ski)
men's short track 1000m, Francois Hamelin
2 man bobsleigh, Pierre Lueders & Jesse Lumbsden
ladies' ski cross, Kelsey Serwa*
men's aerials, Kyle Nissan
ladies' short track 1000m, Kalyna Roberge
*there was also a Canadian on the podium for this event.