it might be interesting to think about how this is best handled in context of a one name study, as that is a more general context, but I can also see this being handled with personal categories. Personal categories have your wikiree user ID prefixed to the category. My user ID is Maranda-80, so I create categories that are for my own personal use as in the following (empty set) example: [[Category:Maranda-80 doublecheck]]. Another user could employ the same strategy, with their user-id instead (it's a category "name space" convention).