Show only this user (in thread)

Several Xenforo forums where I am a member have a feature where you can filter the posts in a thread to show only those posted by a particular user.

On any one of the user's posts in the thread, you can click on this
And, then only that user's posts in the thread will be shown. It's handy to filter down to a specific user's series of posts in a thread.

I have not been able to find this "add-on" anywhere. I would love to add it to my new forum.