Asset Security by Legal Entity/BSV

Hi All,

We aware of the feature Security by Book where you can restrict users for specific books. But we are looking for similar feature, can we restrict users by BSV/Legal Entity.

For e.g: One ledger (and one Corp Book) with 5 Legal Entities and each LE has its own BSV. The requirement here is can we restrict BSV1 users should access (view/update) only BSV1 Assets..

The only other option I can think of is GL Security Rules, so that at least I can restrict user's update access. They can not update Asset Assignments to the BSV they not belong.