Yes. Depending on the subject, it may be the Standards Council of Canada or another organization. Countries are members of the ISO. Canada is a member through the Standards Council of Canada. However, they may delegate the secretariat of an international standard committee to representatives of other Canadian organizations, such as the standards development organizations.
Here is an example. For a secretariat named TC 197, which develops standards in hydrogen technology, Canada is represented by a president and a secretary. They come from the Bureau de normalisation du Québec and they lead the committee. The Bureau de normalisation du Québec runs the international committee, which develops international standards for hydrogen technology. I could give you a host of examples involving other standards development organizations.
In some cases, by contrast, we do not want a standards organization to represent Canada because our industry has no need. In those conditions, the Standards Council of Canada represents Canada directly. Sometimes, it is desirable for standards development organizations to represent Canada, but for all the interests involved to be properly represented, those organizations have to take a truly Canadian position.