We have a Form with a Subform attached that is used to add comments.

In the subform - there are 3 fields (date, email, comment) of which the first 2 are auto-populated (login user id and current date). 

We need to be able to disable fields where the email isn't the loginuserid - so that people can't edit other's comments. From what i've read on the forums - the only information is 8 years old and suggests that the disable option on Subforms isn't possible. Given it's 2020 - is there a solution to allow conditional disabling on a subform?