There may not be any players strictly from the CFL enshrined in Canton (I don't know if there are any), but I would think Damon Allen would have a legitimate shot at making it. That's assuming the Pro Football HOF is open to all pro leagues and is not focused on the NFL players- which it seems it might be.
Damon's Wiki site.
One would think that being called the Pro Football HOF would make it open to all pro leagues, but it does seem skewed to the NFL, AFL and AAFC.