Not possible in WhatsApp AFAIK, but maybe with projects similar to whapp-irc [0][1]
[0] https://github.com/lieuwex/whapp-irc
[1] https://news.ycombinator.com/item?id=18897347
[0] https://github.com/lieuwex/whapp-irc
[1] https://news.ycombinator.com/item?id=18897347