The address you send from or receive with depends on the currently selected address just when you send / receive funds with the wallet. So the transactions used for trading only occur with the local trader
access address if this is where you store your coins. You can even put the local trader address in your archive.
Hope this clarifies
OK, so you can use addresses in local trader other than the address whose key is associated with the local trader account? If so, my concerns were misplaced.