How I can make security on bank transfer in cash management

How I can make security on bank transfer in cash management

Hi friend

We are working on R12.1.3

We decided to use bank transfer accounts in cash management; we have 3 operating units on the application

We will create bank transfer in OU1,, after finishing the setup of bank transfer for OU1

We go to Bank Account Transfers – Create - Source Bank Account – open LOV  Bank Account Number  

this is the problem here because the all of bank accounts of all 3 OU Displayed

I want to make security to display only the banks accounts of OU1  not all Of  Operating units