Summary
/Users/username/Library/Application\ Support/KeyRemap4MacBook/private.xml<?xml version="1.0"?>
<item>
<name>KeyRemap4MacBook Developer</name>
<list>
<item>
<name>MyKeyMap</name>
<list>
<item>
<name>Command_L to Control_L (only VI, Terminal, Virtual Machine, RDC)</name>
<identifier>private.command_l_to_control_l_only_viterm</identifier>
<only>VI, TERMINAL, VIRTUALMACHINE, REMOTEDESKTOPCONNECTION</only>
<autogen>--KeyToKey-- KeyCode::COMMAND_L, KeyCode::CONTROL_L</autogen>
</item>
</list>
</item>
</list>
</item>
Reference
KeyRemap4MacBook 日本語マニュアルhttp://pqrs.org/macosx/keyremap4macbook/document.html.ja
private.xml Reference Manual
http://pqrs.org/macosx/keyremap4macbook/xml.html