Here are the specific committees for scholarships and fellowships. https://www.nserc-crsng.gc.ca/Help-Aide/ScholarshipCodes-CodesPourBourses_Eng.asp
"The research subject code entered on the application will determine the selection committee in which the application will be evaluated. NSERC may assign the application to a different committee if it is determined that the subject matter is more appropriate for another committee."