Hello Tobias,

Thank you for the sample reference you have provided.

The answer to your questions is yes, the XamDataGrid has a Field Grouping feature, which allows you to group multiple fields under a common header.

XAML:

<igDP:FieldLayout>
    <igDP:TextField Name="Name" />
    <igDP:FieldGroup Label="Info">
        <igDP:NumericField Name="Id" />
        <igDP:NumericField Name="Price" />
    </igDP:FieldGroup>
    <igDP:NumericField Name="Weight" />
</igDP:FieldLayout>

I have attached a sample application that demonstrates the approach from above.
For more detailed information, you can take a look at the "xamDataGrid > Organization > Field Grouping" sample from our WPF Samples Browser.

If you have any questions, please let me know.