Yep as part of the NATO and NORAD treaty Canada does produce military equipment used by other nations... just as the US does the same for others in NATO. The same goes for the current conflict in Iraq as well... military equipment wise small arms ammo, LAVs, M16A3, M249s, and GPMGs are all manufactured here in Canada (ironically some parts by Matel).
However you'll note the opening paragraph of the article you referenced:
"The war in Vietnam wasn't Canada's war. Ottawa didn't send troops - but Canada did send a lot of other things, like TB clinics and doctors and nurses. There was also material that was not so benign - from helicopter parts to bomb bays and bulk explosives. That material didn't go directly to Vietnam."
Looks like it mentions the whole Ottawa didn't send troops...
Right I'm sure Ann was confused by the whole no personnel or Canadian military equipment being deployed in Vietnam... then just as now industry takes international orders - and if the orders are to supply 'x' amount of material for 5 years then the contract is fulfilled...
The fact of the matter is Ann looked like the idiot/dolt whater she is on national Canadian television - by being called out on a stupid and false statement... she said Canada had sent troops - Canada didn't - the interviewer even tried to help by explaining Canada's military deployments, and suggesting she had mistakenly thought of the Aussies deployed there - but the fact remains she was wrong no matter how you cut it...