Show only this user (in thread)

#1
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
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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.

Thanks!