Row grouping with sorting - is this possible?

Hi, I´m very happy to see all the possibilities DataTables provides to us. Now I want to use it for an advanced user interface and need your help to figure out if it fits our requirements.

I tried to create a minimal example showing how I´d like to have it. The base table looks like this: http://imageshack.us/a/img89/2850/datatablesbeschreibungb.jpg

Most fields should be editable. I already tried jEditable which works good, so I can use select boxes and edit fields for this.

As you see, it is necessary to have many rows assigned to each person (here "Peter", "Sandra" and "Mike"). I probably could do something like this with a simple HTML table, but what if I want to sort? Sorting by name or creation date is not a big problem, but if I want to sort by any of the green columns, I would like to have a solution this: http://imageshack.us/a/img826/8672/datatablesbeschreibungs.jpg (here I sorted by the "first contact" date)

The data comes from a Perl application, so if it is needed, I could do the sorting thing by this application, not using the DataTables intelligence. But I would be happy if I could use most of the things DataTables already does.

What do you think? Is this possible? How should I go?

Thanks!
dimanche