I have a few contacts with women's Lacrosse in Ontario, but it depends upon when your group is coming to Canada, and where you are planning on touring.
Ontario has a growing varsity league that plays at most of the major Universities during the fall season, then in the spring it switches to High School and Club leagues.
Let me know what you are interested in, and I will try to put a some contacts together for you.
Mark Walker
University of Guelph Gryphons Lacrosse Alumni