To add to this, it's not just Canada either. Here in Portugal we have what we call Ordens, not just for engineers but for physicians, lawyers, and other professions. The title of Engineer is also reserved for members of the Ordem, but you only need a degree from an accredited institution.[0] While this does not have much of a legal implication for software engineering, civil engineering projects can only be signed off by members of the Ordem, given the nature of the field.

[0] Lawyers, on the other hand, undergo very extensive examination, and they can only practice law if they are members of the Ordem.