To create order rules, you need the Order Rules module, if you would like to purchase this, please raise a new case online and reference the title of this article.
The SplitOrderByProductCategory order rule action will allow you to Split the order based on the product categories contained in the order. When using this order rule action, the Order will only split if it's in New status, orders in Backorder status won't split.
Setup
To set up the order rule, please follow the guidelines below:
Select the Action as SplitOrderByProductCategory
Leave the Param field blank
Set up a new Condition
Select OrderItemProductCategory as the Field
Enter your Product Category name in the Value field
Using the Operator as Equals
The Operator Contains doesn't work for this Order Rule action