Remove Permissions From Different Lists

Can you please explain why you want to use a workflow in that case? The same thing should be quite easy using powershell:

Remove all user permissions from list via powershell

Add user or group permission to list via powershell

Hi @philipplucas,

I've a 3rd party add-on which is creating a list and also breaks inheritance on that list which it's creating and grants permissions to certain individuals....The way the process is:

1. The manager will go to master list where manager will create a list item and that information will be used by add-on as parameters for creating a list and granting permissions. 
2. There is a User column in this master list. So, when the add-on is granting permission, it uses User column value and Created By value to grant permission
3. Now, the process is changed and instead of created by value we now want to grant permission to a particular SP group and the User in User column
4. Since this is a 3rd party solution, we don't have rights to make changes to their code. We have hundreds of list and on each list permissions are not same
5. Using Site Workflow and a list workflow, I'm able to grant permission but I'm unable to remove permission. Just list Users, Created By are also not same on each and every list.

I know I can use PS script to remove/set permissions but we want business to manage this once it's done and that's the reason we want to use Nintex workflow.

I understand. You can give it a try using REST to remove all permissions with "breakRoleInheritance" method.

Method Reference

Example using REST

Call REST from Nintex Workflow