It is not possible to filter in the ART archive for a specific purchase group, as purchase groups are linked to specific warehouse locations. But it is possible to have the purchase group listed in a report.

The purchase group (PUGno) field is found in reports with the source: 'Art Stock'. 

Adding the field: PUGno will give the number of the purchase group. If you add a link field to this, you can add the name of the purchase group to the report.