Setting up different php-fpm configurations between Apache HTTPD instances

Issue

• There are multiple Apache HTTPD instances defined in /etc/httpd/conf and each of them run with specific user and all of them use standard php-fpm config (/etc/php-fpm.d/www.conf), but how to have different php-fpm configurations between Apache HTTPD instances (for example, how to manage different session paths (php_value[session.save_path])) for separate Apache HTTPD instances).