Allow role base permissions to email widget, so specific role's user can only change values.

lets say, We Have multiple user roles,
Admin, Sub Admin, dealer.

Admin creates Email campaign, and email using email template.
For this it uses email widgets, now Admin to restrict users from editing email widget data.
Ex:-
Admin created email and add header Widget along with some other widgets and set its value.
It notify Sub Admin & dealer user role that email is created they can change if they want but Admin don't want them to change Header widget value.

so for that I want to provide multi-select control to admin on Header widget it self (or some similar possible options), by which he can chose which user can edit values of widget.