Notification of New Owner If

Notification of New Owner If

Hi, 

Im looking at building a simple workflow, however I am getting a bit stuck on how to get it to action within a workflow...

If current(previous) field value is either: 

John, Jayne, Michael 

and this is changed to something other than these names 


Im thinking using something like this 

create a new field of the previous value (bit of backfilling required which Im happy to do) 

if Field_value1 is not John or Jayne or Michael 

if Field_value2 is not John, Jayne or Michael

Send notification Email

Happy to hear your thoughts?