You can get an open work permit if you are a spouse of a student who is in Canada on a student visa or the spouse of a skilled worker who is in Canada on a temporary work permit. An open work permit means you are free to take any job, no LMO needed.
It's true that only one person per restaurant location can be sponsored and some other conditions, see
http://www.albertacanada.com/immigration/immigrate/foodservices.html