customize interface left.php

[iHuman]

I have the Help Desk TTS add-on and I would like to be able to allow some domains to access it, and others not. Does anyone know how this can be achieved?

There is not a setting for anything in the interface templates for modifying the left nav panel (left.php).

If it were possible to modify this it could be as simple as (for example) if domain_id = 3 display link...

Any suggestions?

thanks!