How to secure the company segment in Expenses 25C without SVS Business Function

Summary:

Our employees belong to one of 3 divisions, and there are multiple companies within each division. How can we limit an employee to creating expenses within their own division, when Business Function segment value security is not applicable to the expenses module.

Content (please ensure you mask any confidential information):

We need employees to have access to the company segment so that they can raise expenses to the appropriate company within their division. However, without any security applied to the company segment, the companies for ALL divisions are available for selection. How can we limit an employee to creating expenses within their own division, not not a division that they don't belong to.