In iTerm2 map the left Command key to the left Control key & map Command+Tab
While not answering the question I have discovered the following work around in the meantime for my most commonly used terminal "control+" inputs:


Ctrl+C - clear terminal line
Ctrl+R - reverse search


Set the remap modifiers in iTerm to default:



Set the keybindings for Command+R, etc. to "Send Hex codes:" and enter the hex codes from http://ascii-table.com/control-chars.php as follows:



And viola it works for Command+R = Ctrl+R as required....to do the entire alphabet would require mapping multiple hex codes