Turn off autoresponder for ONE client?

Is it possible to turn off an autoresponder for ONE person? Meaning, if I have a form I'm using for all of my prospects, but one of them converts into a client and should no longer receive autoresponder emails - can I remove them and them only from getting this communication?

My thought is to remove their email address (edit their submission). Is this the way you recommend, or is there a "smart" more automated way to remove them?

You can also use conditional email on your form. Check the user guide : 

How-to-Send-Email-Based-on-User-s-Answer

What you can do is assign the email address of the person you do not want to receive the auto email in the Conditions.

Ex: 

IF E-mail field is NOT EQUAL to johndoe@testmail.com SEND Autoresponder to {E-mail}

I hope this help. Let us know if you need further assistance.