Currently, the Hulu channel is not available in the Roku Canada channel store. Channel availability/access on Roku devices will vary from region to region. A Roku device will work in any location, however, channels may not be available on your device in that location, based on each channel provider's discretion as well as your Roku device will adapt to the Roku account region.
For more information, you'd want to contact any specific channel/service provider to inquire further about whether they offer their channel/service on the Roku platform in your region.
If you have any other questions or concerns, please let us know.