Found this in the paper about Ouroboros Genesis:
Communication. The parties interact which each other by means of a network of eventual delivery unicast channels —informally, every party Up has an open incoming-connections interface where he might receive messages on from arbitrary other parties. This captures the natural joining procedure of real-worlds blockchains where new parties find a point of contact and use it to communicate with other parties by means of a gossiping (flooding) protocol. As argued in  assuming the honest parties are strongly connected, this netowrk can be used to build the (UC version of the) standard multicast network with eventual delivery assumed in [16, 26, 21].
Could someone confirm if this is a possible answer to my question?