I just tested HotkeyNet with Age of Conan. They work fine together except the current version of HKN can't send to AoC while AoC is in the background. If AoC is in the background, HKN will bring it forward before sending. Here are some examples that show how to set up HKN for two copies of AOC.

Code:
//----------------------------------------
// SAMPLE LABELS
//----------------------------------------
<Label aoc1 Local SendWin "Age of Conan">
<Label aoc2 192.168.1.102 SendWin "Age of Conan">

//----------------------------------------
// SAMPLE MOVEMENT KEYS
//----------------------------------------
<HoldDownKey up, down, left, right>
<SendLabel aoc1, aoc2>

//----------------------------------------
// SAMPLE BROADCAST KEYS
//----------------------------------------
<BroadcastKey 1, 2, 3>
<SendLabel aoc1, aoc2>

//----------------------------------------
// SAMPLE CHAT COMMAND
//----------------------------------------
<Hotkey F1>
<SendWin "Age of Conan">
<Key Enter><Text /say hi><Key Enter>