Why would the government.  The only way the current government might change the rules is if right wing groups start funnelling money to support right wing advocacy groups in Canada and they actually succeed.  Since more Canadians are on the left than right, most right wing groups are either think tanks like the Fraser Institute or one's that pander to a narrow base.  The Liberals have zero reason to ban this even if they should.  Although to be fair considering the spread, I think the Conservatives defeated themselves.  At most maybe this would have denied the Liberals a majority, but that is questionable even.  Otherwise while wrong, I believe the Tories would have lost in 2015 either way.