How to restrict business Unit For particular user in ax 2012

Hi Experts,

My requirement is, In sales order form Line Detail Tab  ->  Financial dimension -> Business Unit, User can able to select only assign business unit, another business unit he can not able to see. For that i created one query and assign the range , and create new police and give the role for particular user.

Now user can select only assign business unit, but he can able to see another business unit also.

And my requirement is he can not see the another business unit.

For Example:

I give the "PU01" range for the  particular user and user can see only "PU01" range, another lookup business unit he can not see.

Please help me

Thanks and regards

Rahul