is it? country of resident would be Canada in this case, you are able to fill in the status of "visitor" if you say Canada - and if they are on super visa and stay here for years, this is where they live.,
Then in this case, for super visa holders currently in Canada, Will we mark as other as super visa option is not there and then in comments mention super visa. Doubt on putting as visitor, because 1st thought that comes seeing the visitor is 6mnths validity and but they have stayed more than 6 months on super visa.