Is there a way to restrict the users to use only one cost center on a GL string for Procurement

I have a requirement from a client to restrict their users to use only a specific cost centre (segment on a GL account string) when they create a purchase requisition, purchase order etc.

We can provide data access to specific Business Unit, but the scenario here is only one Business Unit with around 400 departments (each department is a segment in GL account string).

Please let me know how to perform this restriction.

Thank you

Sriram