Thanks Denise.
I am currently working in Canada but I was not Canadian-trained. I went through the credentialling process and the national exams.
I tried to email WA board and just mentioned that I was registered in Canada (without saying I wasn't Canadian-trained). The reply I got was a standard one: Only physio graduates from the universities in the list can directly register in WA. Actually the list contains all the universities which train physio in Canada. In my credentialling process, my qualification was quoted as 'equivalent to Canadian-trained'. So, logically, I thought I was elligible to register. However, it seems that officially, the WA does not accept it.
But maybe I should write clearly my case and ask.