Yes, this is possible. I did not use it but found it in the Xceed Help File:
<b>How to create multiple (grouped) column headers</b>
The grid does support having more than one ColumnManagerRow in its headers, however it does not support (directly) having grouped column headers as demonstrated in the image below:
In order to simulate column grouping you must create a custom row (that derives from the Row class and not from the ColumnManagerRow class) and use it in your grid.
The following code (class) demonstrates the minimum implementation required to simulate column grouping:
Imported from legacy forums. Posted by Kai (had 3032 views)