Most health care professionals don't deal with abortions at all.  However, if a women is in a hospital and must have an emergency abortion or she might die, then delaying what the women needs, due to your conscience, should not be allowable because abortion is legal.  I would recommend that such individuals, choose a different area of medicine if they are concerned they will end up in a conscience trapping situation.  They could also choose certain private hospitals, women who go to these know that no matter what, abortion will not be given - like a Christian Science Hospitals, etc.

I am guessing that there is more to the Canadian example too.  Is TWU an accredited Law School?  I don't know of any law in Canada that prohibits lawyers from earning a degree from any accredited Law School based on sexuality.  Also what do you mean by barred?  Canada is not letting them take the Canadian Bar Exam?  This example seems a bit suspect so I suggest you check out the details a bit better.