Read this on the Canadian Firearms Digest. I recommend that you subscribe to this forum as the discussion is greater than what happens here. There are several international subscribers. We are kept apprised of the current situations in the US, UK, Australia, Europe, etc.
Same same our side of the DMZ.
When we re-new our permits to own property that we've owned for decades before the legislation or when contacting the Canadian Firearms Centre for a handgun transfer, there is a "spousal concern" call option.
A woman simply has to express a concern about you owning firearms and your firearms are seized. You may or may not get them back, depending on the history and previous issues.
This came about as policy years ago after a woman was murdered after her estranged husband's guns were seized and subsequently returned. A serving member of the rcmp showed up at a CAS event when this became policy and showed us the document from the policy manual.
A spiteful neighbour could do the same thing. We are all vulnerable. A friend (a licenced trapper) has had a 5 year firearms ban imposed on him as a result of an argument with a cantankerous neighbour during which NO firearms were used or threatened.
I'm not sure what would apply in the case where both the husband and wife have firearms as presumably one would be able to access the firearms of the other.