Problem with rights in Webserver

Hello,

I am using Virtual Cloud Server With Centos and Plesk.

I ran several Websites in the Server. They are all running with PHP 7.0.22 - FPM served by Apache.

The Problem is, that The scripts and Software Applications of The several Websites create Folders and Files equal Cachefiles and Folders. With that i am getting several Right Problems, because some Folders are Created with the Root User, ohers are created with the FTP User of the Domain.

Now i cant Export Files via the Software...

Problem with rights in Webserver