Is it possible to look up a specific person in submission data of all forms at once?

I forgot which version of a form a client filled out. Is there a way I can look up the person? Or do I have to look up the form and then look up the results from that form? Thanks. 

Let me please inform you that the data can be searched only on a per form basis via Submissions/Inbox of the form.

There is no global search option available at this time. We have raised a feature request, so we will let you know if it will be implemented at some point.