User level authorization wise F4 help functions

Dear All,

We have a requirement i.e. User should be able to see only authorized entities when he/she press F4 on any field like Company code,Customer number,Sales Organization etc.. in any standard screen of SAP transaction codes.

For Ex: we have 3 company codes 1000,2000 and 3000. Assume user is authorized for 1000 only. If user presses F4 on BUKRS field in any screen, it should show only 1000 as possible entry.

Is there any way to address this issue. Please help....