How to separate assets by Department

Summary:
Client currently has two people that add and maintain all assets.

To-Be business process is to have departments do all transactions and the two people will be approvers.

One Corp Book linked to one GASB book.

Content (please ensure you mask any confidential information):

Would like to have departments do all transactions, however, how can I show the source lines belonging to one department vs another? We're already using SVS on the Dept segment, but that doesn't help to know which source line one department should updated vs the other.

We've reached out via SR to add DFF to Asset Workbench, not able.