Separate the main domain from the addon proxy directive?

I have a problem of configuration of the addon domain, example.org. I installed on the main domain, i.e. example.com, an application developed in Perl with Dancer2 which runs on the Perl web server Starman and forward its requests to Apache through mod_proxy.The main domain, example.com, works fine. But when I want to access the addon domain, example.org, which has a simple static web page, it shows up example.com instead of the static page. I can't figure out how I can separate the main domain from the addon. The proxy directive in the postvirtual include text area of Apache is: Require all granted ProxyPass I suspect that this directive is global. I want it only for the main domain, example.com. I hope I am clear. Can anyone help me? Thank you.