With Virtualmin version 6.00 you can go to System Settings > Server Templates > Default Settings > PHP Options and select
FPM (run as virtual server owner) for the
Default PHP execution mode, however when creating a virtual server it gives:
Performing other Apache configuration ..
.. configuration failed : PHP configuration mode fpm was selected, but is not supported on this system!
FPM (run as virtual server owner) option was available just couple days ago, but after last update of Virtualmin if you go to Server Configuration > Website Options then you will see only
CGI wrapper (run as virtual server owner)
FCGId (run as virtual server owner)
even php_mod is gone.
I hope the options are missing not because I didn't install PHP 7 that comes with Virtualmin as it is not possible to install php-memcache for it. Those options especially php_mod should be available for PHP 5.4.16 that is officially supported by Fedora, RHEL, CentOS systems.