Allowing a field to go into the database that is the same

I know this is a weird request - but trust me it makes sense for my particular application. In the backend of Gravity Forms I have an email field checked with "No Duplicates". Is there a way in a hook to change this to allow duplicates at the last minute if the form meets a certain requirement?

Chris,

I am trying this:

add_action('gform_is_duplicate', 'allowDuplicateFields', 10, 4);
function allowDuplicateFields($count, $form_id, $field, $value) {
	 return 0;
}

but it is not working. Basically I want to manually override through a hook if I will accept a duplicate email. For simplicity sake lets say that I always wanted to validate a duplicate email as long as the value was test@test.com but require every other email to NOT be a duplicate.

Does this make sense? Any help would be greatly appreciated.

Thanks,
Travis

Yes,

I have the conditions outside this hook so it should allow all fields to validate no matter what but it is still catching them somehow. If might be because of this hook following it?:

add_action("gform_after_submission", "gf_us_set_post_content", 10, 2);
function gf_us_set_post_content($entry, $form){
	RGFormsModel::save_lead($form, $lead);
}

I am trying to save this form back into the database to overwrite an existing entry. Does this hook appear like that is what it will do?