I want to restrict the user to the website edition if it does not belong to your company.

But if I enter as UserB (which belongs to the COB company), I can edit the COA website.

To configure it I followed these steps:

https://www.odoo.com/documentation/user/12.0/website/publish/multi_website.html

It is also configured: settings >> active users >> select user >> under "allowed companies" set the company the user has rights to

My configuration is this:

Company A

https://i.ibb.co/HXtbsCs/CoA.png

Company B

https://i.ibb.co/bFTZ7dc/CoB.png

User A, with your only company allowed (Editor and designer mode)

https://i.ibb.co/WBQNgQD/UserA.png

User B, with your only company allowed (Editor and designer mode)

https://i.ibb.co/GHkj3Zh/UserB.png

Users Company A (Only UserA and administrator belong)

https://i.ibb.co/SxFp0Tq/Usuarios-Co-A.png

Users Company B (Only UserB and administrator belong)

https://i.ibb.co/tP1bCZY/Usuarios-Co-B.png

Websites (Default configuration)

https://i.ibb.co/rw9ctv4/Websites.png

Website A

https://i.ibb.co/Vjhnt4m/WebA.png

Website B

https://i.ibb.co/VpYNwCJ/WebB.png

Website A config (WebB in company CoB)

https://i.ibb.co/8jQ54cx/Web-A-config.png

Website B config (WebB in company CoB)

https://i.ibb.co/HChCtzD/Web-B-config.png

I also have configured as:

Multiwebsite and multicompany

https://i.ibb.co/fNSmq1q/multiwebsite.png

https://i.ibb.co/Z6pYZYt/multicompany.png

When I enter as another user (for example UserA) I can edit all the websites (for example WebB)

https://i.ibb.co/4ggrRqK/error1.png

And here editing a website to which my company does not belong

https://i.ibb.co/6bfvL29/error2.png

<b>What is expected is that you can only edit the websites that belong to our company</b>