Customer Search for Company wise

Hi,

Can any one help to the below said issue.

We have two Set of Books(Company) and we have created the customers for this two companies. While search the customers in Customer master screen, the result provide all company customers. But we need to search the customers for company wise only.

for example : If we enter the customer name like MOHAN% in customer master search screen the result provide all the customers names atart with MOHAN from this two companis. We need to system provide particular company customers in search screen.

Is there any option to search the customers for Company wise?