I think you can. Though the employment requirement under NOC 4151 requires doctoral degree in Ontario ... Or master in other provinces (http://www5.hrsdc.gc.ca/NOC/English/NOC/2006/QuickSearch.aspx?val65=4151) but that is for specific job titles.
For instance, to work as Psychologist in Ontario, you need to have doctoral degree, however the regulation doesn't specify the same requirement for research psychologist or behaviorist.
I suggest you visit the earlier link and surf through the job titles and duties so you pick the most feasible title to help you file a successful application.