Support sharing a Document with multiple external users at the same time

Customer has a use case where a Document needs to be temporarily shared with multiple external users at the same time. The External user sharing from allows only one email to be specified. The EasyShare folder is nice, but it doesn't offer the same security (temp access and specific email addresses).

Is there there a way to enable multiple recipients to be specified on the External sharing form? If not, can this support be added to a future release?