It's not possible, but we have a feature request in the backlog for this. If you are an existing customer, please raise a support ticket through my.parallels.com so we can add your details.
It's on the internal issue tracker of our development team. If you're an existing customer, I highly encourage you to reach out through my.parallels.com . That way, we know which customers are actually looking forward to this feature. One of the factors we do keep in mind, is the number of customers asking for a specific feature; and their exact use case.