One of the fields in https://phabricator.wikimedia.org/maniphest/query/advanced/ is "Users' Projects". I'm not aware of a definition of what "projects of a user" are: watched projects? projects one is member of? projects one created? projects one has herald rules about? projects one has super-powers on? projects one has some privilege on by virtue of some rule? projects one has defined as "my projects" in some other places?
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It says "In User's Projects". Note the "In". In the projects the user is member of.
These are your projects: https://phabricator.wikimedia.org/project/
I have been never confused by this, and from the several options you are mentioning, this is the only one that makes sense to me.
I don't see any task to complete here. Proposing Invalid.