The current government has created selection tools to give francophones an advantage, and that is definitely a first. At this time, we don't have a policy on favouring francophones for family reunification. If we take francophone immigration targets into account when processing applications from Canadians hoping to sponsor their spouse or grandchildren, we end up favouring one group over another. But if we manage to attract francophone economic immigrants at a rate of 4.4% or more, these people will later naturally tend to sponsor their spouses, parents, or grandparents.
As far as I know, no government to date has studied the possibility of having a process where one Canadian get to sponsor their spouse and another doesn't.