StarShip supports consolidating multiple Sales Orders into one shipment in StarShip. This means you can ship a group of Sales Orders with the same Ship To address at once.
Simply select the Sales Orders and click Create Shipment.
On the Ship screen, you can see under Source that both Sales Orders are on the shipment.
You would then continue processing the shipment as you normally would.
Once the master shipment is processed, StarShip writes the shipment information for each Sales Order back to Acumatica, to the Record Note on the Shipment.