Way back in versions around .5x and .6x, BitComet had a chat client built in. It was abandoned. Chat clients that weren’t trying to be bittorrent clients, turned out to be a lot better at chat.
BitComet can’t and shouldn’t try to be all things to all people. LAN manager software exists to do exactly this sort of thing for the few people who want it done. It will do that far better than anything that would be built into BitComet short of developing a full-fledged LAN manager, and there’s already too much competition for that.
Let the chat software do chat, let the lan management software manage the bandwidth, let BitComet do bittorrent, says I.