Exclude a Row from sort order

Hi @ll,
is it possible to "fix" a row at the bottom of a reportcontrol wich is excluded from any sort order the user selected?

I want to load a simple list with 5 columns and about 15 records into the control with an empty line at last, so the user can add a new row by edit the first column.

Now i want to fix this single row and exclude it for each column sorting and grouping

Any suggest?
thank you for your help