Webform Date Fields - Allow Restrictions

We are capturing date fields on a Web Form as part of a Maestro Workflow. We are pushing the date fields collected into Salesforce. Salesforce has validation rules on some fields that will not allow dates that are in the past.

This will cause the Maestro Workflow to fail upon SF Update and/or the Salesforce processing to fail.

We would like to see the ability to allow restrictions on the Date field (e.g. current and future dates only)