No way now, and no way for the foreseeable future.

It's useful, but only for trading. We are not a forum dedicated to trading. If you have a suggestion, I will only consider if it improves the forum in general.

Explain how "pulling out the member topic from my statemate" helps in arranging your yumchas. Are you going to spam all the topic starters living in the same state to attend your yumcha?

I still don't understand why you think it makes it easy to arrange yumcha.

In the past month we had 13580 distinct members post (let's consider them active members). Malaysia has 14 states (disregard that we have overseas posters). So there exists at least one state which has at least 970 active members.

Suppose you're in that state, and you know who your 969 fellow statemates are. What's your next step in arranging a yumcha?