You could try hunting through the ".plist" files that launchd uses like this:
find ~/Library/LaunchAgents /Library/LaunchAgents /Library/LaunchDaemons /System/Library/LaunchAgents /System/Library/LaunchDaemons -name "*.plist" -exec grep -H 6183 "{}" \; 2>/dev/null
find ~/Library/LaunchAgents /Library/LaunchAgents /Library/LaunchDaemons /System/Library/LaunchAgents /System/Library/LaunchDaemons -name "*.plist" -exec defaults read "{}" 2>/dev/null \; | grep 6183