help ;_;

Is it someone specific or is it someone that has a Manga your looking for as far as I know there is no direct way to find someone by their username if you have a username and a manga that you know it's in their list there's a way to find that person homepage if you shared to detail with me I might be able to help

Who? Some of us may have bookmarked the page ...

If you share The username and the Manga I might be able to help*

i am kinda sure there is no way to search for a user-name on mangago. if you want to find a list of a specific user, it`s gonna be difficult if you don`t have a name (from an answer or question) to click on.
maybe you can remember at least one manga that you are sure it is on the list you search for? then you have a chance to find it at the right under "Recommend Lists" - "more lists"

I don't know how to do it either, but just throwing it out there: you should definitely check out Kathy's list. Should be easy to find her name, since she's always helping out.

1 Click at name:: When I found someone's nice comment and I want to follow her other comments, I always do this and save that comment as my favorite to trace back later.
2 Click at list:: Then follow that list if you like.

That's enough for me, as I have no reason to visit someone's homepage, if I'm not interested in their comments or lists.