I have a similar request. In our situation, I add ~200 list items each month . There is a field in the list which differentiates the list items between Company A, Company B, etc...
Is there a way to have the Item Level Permissions changed to specific permissions lists that corresponds to Company A, Company B, etc....?
I could break permission inheritance on each item and manually change the permissions of each one each month but that is going to be rather tedious for 200 items split between 25 different groups.
I read something about an 'Impersonation Step' that was part of sharepoint designer 2010 that would let you change permissions as part of the workflow. I then looked in Flow to see if there was anything similar but didn't see anything obvious.
Since Company A, Company B, etc are part of the 'companies list', maybe I could have item level permissions to those items and thereby effectively limit this list?