All instances run as www-data (shared hosting support)

[randomstuff]

All instances are running as the "www-data" user which mean that they can read/write data from each other (and from other applications), "rm -Rf" or "drop from wp_posts" between each others. I'd like to use it in a shared hosting setup but to do it it would be necessary to have each instance running in a separate user (creating a separated php-fpm pool for each instance).

Others aplications might be concerned (such as my_webapp_ynh), maybe some synchronization would be ok in order to have a similar solution.

[randomstuff]

Whats more they are run as "www-data" which means they can touch other applications such as roundcube.