I will explain it very briefly.
Voters are presented with a list of candidates, all of whom are affiliated with a party, but that is not the most important part. What counts is the relationship they have with the candidate.
On the other hand, there is a list of parties across the country. All parties appear on it. However, the Bloc Québécois could appear only in Quebec, not in the rest of the country.
I will submit a brief to you.