Thre is no reply to, we have Sender email and Recipient emails and macro are available for all fields in Notification email tab. Lets say your form has a drop down called department (1 - Sales, 2 - Marketing, 3 - Accounting) When a users submits your form - department field gets one of those IDs:
{%
result = "default@acme.com";
if(department == "1") {result ="sales@acme.com"}
if(department == "2") {result = "marketing@acme.com"}
if(department == "3") {result = "accounting@acme.com"}
return result;
|(identity)GlobalAdministrator%}
Just convert it in one line and put into Sender email or Recipient emails :)