Perhaps...or I'm misunderstanding.
I think, again, that the elements in the subscriber information definition were there to give examples of the types of information police need during an investigation in order to identify criminals. The reason they're included is that there are real-life examples in which they might have to go after a pseudonym or they have a suspect and they know this person via an IP address, and that's why they've gone to Rogers, for example, and asked for the subscriber information. If Rogers has on hand any pseudonyms that the client used on their services that are registered with them—for example, email addresses they might have registered with them—then it could provide those.