Multiple Delivery sites

IBE: Use Line Level Shipping: Yes
Specifies whether customers can enter line level shipping information in shipping information page. Possible values – Yes/No. Default = Yes. If set to Yes, set IBE: Merge Shopping Cart Lines to No, as you cannot enable shopping cart line merging
and line splitting simultaneously.

IBE: Merge Shopping Cart Lines : No
Specifies whether to merge item lines in the shopping cart if the same item is added to the cart more than once. Yes = Lines are merged if duplicate; No = No line merging. Default = No. If set to Yes, set IBE: Use Line Level Shipping to No.

After adding products to the shopping cart and clicking the Check Out button

We can see an option to specify different shipping details for items. Once we select yes and continue checkout, we arrive at the page shown below

The user can select the item and update shipping details on an item level basis.

The above pages show that different shipping addresses have been assigned to them. If the user does not choose any address, the item is shipped to the default primary address