I have to use a filter on a column that contains two types of Users. Upon adding the filter I am seeing all the values in the column eg all the user names. I want to limit the user names in the filter dropdown as i wish.
Depending on your usage, you can use Linked Filters:
There's a request for manually controlling the values in dropdowns:
https://github.com/metabase/metabase/issues/5245 - upvote by clicking on the first post