@vincent15000 to simplify my response, if you have two sets of users (A, B) and two sets of data to send to them:

• tweak the EndpointUpdated event to support two formats of output data:
  • full details, for the user (A) that changes the data
  • limited details, for the others (B)
  • do this by setting a property via a constructor (and switch accordingly in the broadcastWith()) or just check the users roles, compare the user id to updater id, etc

public function __construct(
    public $users,
    public $sendFullDetails = false
) {
//
}
public function broadcastWith(): array
{
	if ($this->sendFullDetails) {
        //full details
    } else {
        //limited details
    }
}

• when firing the event, fire two of them
  • broadcast(new EndpointUpdated([$userA], sendFullDetails: true));
  • broadcast(new EndpointUpdated($usersB, sendFullDetails: false));

or if A/B is not enough, just loop each user and fire the event specific for him (and check his rights directly in the broadcastWith())