i suppose that this is not possible. It wouldn't also be a good idea to sort a table outside the JSF context, because JSF don't knows anything about resorting. The tables provide also a feature, when you have some links or buttons within the table you can get the clicked row data (the "var" -Object behind the row) via JSF (getRowData on the Table-Component). When you do a custom sorting, you will get something different from that method.
If anyone else has used this plugin with JSF, let me know. I have no idea how to access the updated list once you move rows around.