Yes, each member has the possibility to choose upfront the counterparties they prefer to trade with. All the bids, offers and market trade notifications are always anonymously available for all members on the DAO.EU marketplace. A pop-up ‘You can’t trade with this counterparty’ will be shown in the trading screen when you hit the buy/sell button and the bid/offer came from a counterparty that you have blocked or the other way around.