There were only two groups I could find but there are likely lots of Canadian book artists. Add your links in the comments (moderated – they won’t automatically show up when you post).
Canadian group promoting art bookbinding. French-Canadian site.
Supports the development of the book arts in Canada. Bookbinding, artists’ books, papermaking, calligraphy, letterpress printing and typography, wood engraving, paper decorating, restoration, and conservation.