Mask the bank account numbers for some roles using page personalization

We we able to mask the bank account numbers for some roles using page personalization from manage invoices and manage payments page. Even though the employee/supplier bank account field is made visible only to AP roles, GL Manager is still able to view bank account details through drill down

1. System Security Options

2.Page personalization to restrict bank a/c visibility to AP roles only

3. Issue : GL Accounting Manager is able to view the employee/supplier bank a/c through drill down functionality