Hi ColeCW,
Yes it is possible to achieve the same in native system.
There are in fact two ways you can do it.
1- Using release to warehouse form
2- Using load planning workbench
1- Using release to warehouse form - You can use the release to warehouse form to club all the sales orders for the same customer and release them all at once to generate one work, one shipment and one load for them.
Navigate to release to warehouse form and select all the sales order you want to club in one load and click "Add". This will bring all selected sales order to bottom pane of release to warehouse. Now click "release to warehouse" to release all these sales order in one load. Note you will also get one work and one shipment.
Kindly make sure "Consolidate shipment at release to warehouse" is checked to yes in the warehouse master.
2- Using load planning work bench - You can use the load planning workbench also to achieve the same. Click on load planning workbench from any of the sales order and click "entire order to new load" in the action pane to add it to a new load now manually add all other sales order for the same customer to the same load by clicking "entire order to existing load". This will make sure that all the sales order for same customer are now in one load.
Now in the load planning workbench itself select the load and click "release to warehouse". This will release the load of the warehouse and will generate one work and one shipment for all the loads and sales orders.
Kindly make sure "Consolidate shipment at release to warehouse" is checked to yes in the warehouse master.
You by this way you can have a consolidated load for multiple sales order going to same customer. This also allows workers to process only one work for entire load instead to processing individual sales order work.