From version 03.06.05 we have added support for dynamic tokens to the Workflow From email field.

Enabling this support provides further flexibilty in using the a form value as the From email address in workflow email notification.  Once of the advatanges of this feature is that it could be used in a Feedback / Contact Us type forms to allow the form submitter to use his/her email address for direct email correspondence between the users.  An example of this is the Contact Us page where we are using to allow customers to contact us directly without having to use the Enterprise Forms workflow engine.