Hide documents based on the User role/Group

I have a requirement, in which I want to hide the documents of one group to another and viceversa.

There will be 2 ACL roles namely Finance and Investments.

If Finance role is enabled for a user/user group, then the user/user group should NOT be able to view documents of Investments with “Department” type as “Investments”.

If Investments role is enabled for a user/user group, then the user/user group should should NOT be able to view documents of Finance with “Department” type as “Finance”.

How can I do that? I have 20 views which is commanly used by both dept. Quick help will be highly appriciated

Subject: Hide documents based on the User role/Group

Use a Readers field on the documents. Compute the value of the readers field to be the Role(s) that CAN access the document.

Look up readers fields in the Domino Designer help if you need to know more.