How/Where can i search for interactions between users?

i want to find a comment i made on a post from a couple if years ago. i know the posters users name.

i have done this before but can't remember which UI

Image Source: https://clipartmag.com/person-thinking-with-question-mark

My Question:
Which UI's have the ability to search for interactions between 2 users?

A prize of 50% of author reward on this post will go to best successful answer (imo.) as well as any #commentrewarder rewards (set at 5‰ for all my posts - and comments i think)

Peace and Love
Atma

#prize #contest