Although I have yet to see any photographic evidence of WLA's in Canadian Service; since seeing the US Army ride a WLC, I guess anything is possible.
For pictures of the WLC used by a 9th US Air Force Signal Unit, please go to the bottom of this page:
http://www.theliberator.be/liberator7.htm
Although WLC could have been used by all branches of the Canadian Forces in Europe, it seems British made bikes (ie Norton 16H) were used in larger numbers and much more prominent. This is confirmed by period photographs.
Johan