Question It´s posible to enable xdebug on a per-domain or per-suscription basis?

[Parqueweb]

I am running PHP under Plesk 12.5 on Linux as FPM served by apache. I am trying to set up XDebug for one domain. To do this, I'm putting zend_extension=xdebug.so into the text box Additional configuration directives, but when I run phpinfo trought the browser, the extension´s settings aren't there.

If I mark the xdebug checkbox in tools & setting -> PHP Settings, the extensions is correctly loaded and I can see its settings in phpinfo, but this affects all domains using that version of PHP

How can I enable xdebug for a single domain?

Thaks in advance.