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?
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.