How to view all messages of a specific person on Steam?

Question

Steam

This refers to all public messages, and not personal correspondence in the chat. That is, a person may not even be friends, or maybe it doesn’t matter. And public messages are all his comments on manuals (someone else's and his own), Steam Workshop mods (someone else's and his own), topics in Steam discussions and forums, in other people's profiles, etc.
If at all possible, what is needed for this, what conditions and what tools?