techsupport

I saw a screenshot the other day of someone having tagged someone else with a note to help them recognize them later.

For example, if I wanted to tag [email protected] with a note of "Admits to sometimes secretly dressing up like Tarzan", so that I see it next to their name every time I read a comment/post.. how do I do this?

Bonus-question: Is this possible in my preferred app, Voyager?

Note: GatoB may or may not secretly dress up as Tarzan from time to time, I do not know. Not shaming either way.