Moodle modification for multischools

Hello, i want to use my moodle server as a platform to allow severall schools to create their elearning web.
So i need my moodle website to handle course and categorize depends on login.
if the user is from a specific school, he can see only the course from the professor of this school.
the course creator can see and edit only the course they created.
I will be able to add schools in admin area and manage user from any school i created.
the register process don't change, we just need a school data to be added in the form.
and maybe some details i will give you later.