New window depending on external or internal link

Hi, I've seen that in the configuration page of the module you can choose if you want _self, _blank, _parent or _top target. My question is if there's any way to make the links open in a new window depending on the kind of link: internal or external. Maybe this could be implemented using External Links Module or it could be configurable for every ad.

If there's any way to do it in this stage please let me know. Thank you very much!