what goal do you need to achieve?
TradeCopy has personal license, meaning that you cant copy trades only to your own accounts.
it can work in LAN (or WAN actually) as trades exporting accounts can be accesses with investor or real password from any computer in the world.
if you want to copy trades (or send trade signals for autoexecution) to other people's accounts, then you need other product - mql4.info - IMTradeSignals