It doesn't have anything to do with the network. Only people that have access to the Roku account the camera is linked to will be able to view the camera. You could set up a Roku account specifically for the camera and give everyone access (username/email address and password).
People have asked for a feature to allow "guests" to view cameras, but Roku hasn't obliged yet and I never advise waiting for Roku to add a feature. It may never happen.
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