When a hacker intercepts communications between a buyer and a seller and siphons off the proceeds, does one of the parties bear some responsibility? That is a question being hammered out in a London court in the case between an Irish aircraft parts trader and a Thailand-based dealer. Logix Aero, a Louth-based aircraft engine trader, is appealing a decision from last year in a London court where it failed in its case to hold Siam Aero responsible for the more than $820,000 (€695,610) it lost in the fraud. Logix was in the midst of negotiating a deal with the Thai…