Process Author Alert When Record Modified by Someone Other Than Assigned User

I actually figured it out... I just created a calculated field in Studio that only changes when the Modified User does not equal the Assigned User then created an alert based on that field changing.

Brilliant Mind sharing the formula?

The custom field has the following formula:

ifElse(not(equal(concat(related($assigned_user_link,"first_name"),related($assigned_user_link,"last_name")),concat(related($modified_user_link,"first_name"),related($modified_user_link,"last_name")))),"not assigned user","assigned user")

I then have a workflow that is triggered when the custom field equals "not assigned user".

Mega awesome - thanks!

I´m still struggling with these formulas Good to learn from examples likes this. Thanks, KGM