Form success message

First of all thanks for a very powerful plugin that does more than most plugins charge for!
One thing that I am not able to figure how to edit “correctly” is in the sample below:

I have a really simple form shown on the frontend that I only allow myself (admin) and a custom role “mediator” to access. I’m using the edit-profile form. I have a select 2 that allows myself (admin) or custom role (mediator) to select a member and in a dropdown I have the choices allow,disallow.

Now everything works just fine! The problem is the success message after the form is submitted says “Your profile has been successfully updated!”
I don’t want to use Label Edit to change that phrase obviously because it is used elsewhere where a person is actually updating their profile.

But how to I for THIS form only use a different success message? Because “Your profile has been successfully updated!” does not make sense, we (myself or mediator) are simply granting a user we select either allow or disallow. MY profile hasn’t been updated, so that message make no sense.