Only in Quebec do there seem to be Senate districts. In all the other provinces, they do not exist. Candidates run for the province as a whole. And, from what I understood of the bill, even in Quebec, the election or consultation to appoint senators will be province-wide. Under the Constitution, senators are appointed to represent districts but, for the purposes of the consultation, it would be a province-wide vote.
On April 9th, 2008. See this statement in context.