Dear Louis,
You can log onto Canadian Physio Board for details. Before taking the competency exam, the board will require your physio programme outline too see if you are eligible for the exam.
The examination is divided into two components. The written component can be taken elsewhere overseas. The practical component should be completed in Canada. You are recommended you take some supoervised work in clinical settings in Canada before taking the exam.
On the other hand, you have to contact your local consulate about the immigration process to Canada. It depends on your nationality, so you'd better contact them directly.
Megan