What exactly are you submitting? I had to use a Web Form to cancel a representative but it didn't ask where my application is being processed. If you submitted an online application (instead of a paper one) then I think you should say that you submitted from within Canada. I think that you only select that you submitted from outside Canada if you submitted a paper application to your local visa office. This is just my reasoning and not based on personal experience so feel free to wait for another response.