Account Security customization in Eloqua

In Eloqua instance, I have successfully configured four Business units for Marketing (custom fields) : CCS, CCS_Test, VTS, and VTS_Test. I have successfully implemented Contact Security, ensuring that users can only view contacts associated with their respective business units upon login.

Now, I have a corresponding requirement for Account Security in Eloqua. Specifically, I aim to restrict users' access to accounts based on their business units. For example, when a CCS user logs in, they should only be able to view CCS accounts.