Filter needed that hides MY tweets on # from just some users.

There is something that users of Twitter can use to hide THEIR own tweets from just some users when commenting on a hashtag. It is not the blocking function. It only makes their own chosen Hashtag comments invisible to SOME users not, others. Blocking a person does not make YOUR own comments invisible. Does anyone know what it is called & where I can download it?

I know it is some sort of filtering device just don't know which one.

I am running Chrome with Windows 7. I also have Internet Explorer 10.

It's driving me wild looking through all the extensions & add-ons trying to guess which one will have this function included. :cry