Make field read-only based on other field's value

Hello!

I am in the finish line of setting up SuiteCRM for a company and everything is going well except one thing:

I would like to make read-only all the field for opportunities for certain users (or security groups are better options) based on another field. Namely, if an opportunity is not open (closed won or closed lost).
In other words, I would like to achieve that an opportunity is not modifiable after it is won or lost.

Is there any way to do it?
I would pay for it if I need an extension or custom coding.

Thank you in advance for everybody.

You have to use Javascript for that:

Check this post:

https://community.sugarcrm.com/message/69913#69913

Here is another one:

https://suitecrm.com/suitecrm/forum/suitecrm-7-0-discussion/11050-display-subpanel-based-on-field

AlxGr

Have a look at this add-on https://store.suitecrm.com/addons/dynamic-panels

It is easy and seems to meet your need.