I'm a poll worker at the Alberta elections, and this isn't quite as cataclysmic as it sounds. Even without this leak, there are tens of thousands of poll workers, and it's really easy to become a poll workers, so most people who need to keep their address a secret either use a post office box for their registration, or don't register to vote at all (since you can vote without registering in Canada [0]).

That being said, it's pretty easy to get registered accidentally (I believe that the tax agency and the driver's licence agency both register you unless you opt out [1]), so this is still fairly bad.

[0]: Well, technically you must register to vote in Canada, but you can always register at the ballot box, and there's a checkbox that lets you opt-out of saving your information in the database (meaning that you'd need to reregister every time you vote).

[1]: You can use a post office box on both your taxes and your driver's licence, so that's usually the best solution to avoid getting accidentally registered with your real address.

"An Edmonton city councillor says he and his team are helping a woman facing intimate partner violence relocate with her children after her address was leaked in an alleged privacy breach by a separatist group."