Multipe choice for t partes and contacts on events

Always when I try to save an event or meeting in the calendar I come to the same limit:
eg I have a meeting or event with different participants from differnt third partner, but Dolibar allow me only to choose one related company with telated contacts only to rhi company. - What to to the with the other related contacts and partners? - One slution is an extrafield to not thos thirs parties and contacts. But better would be just to hae a multiple choice for third patrners and contacts - Couldn’t this be integrated i a future dolibarr release?