Client ACI question

[Vesa Alho]

Hi,

I have read various documents (including Redhat ones) about ACI 
implementation. But still the following basic scenario confuses me.

* anonymous bind disabled
* each client server is authenticated with a unique username (e.g. 
"ou=ServerUsers,dc=domain,dc=com")

* "ou=Projects,dc=domain,dc=com" holds confidential data
==>
"uid=serveruser1,ou=ServerUsers,dc=domain,dc=com" should only be able to 
see one or several entries under "ou=Projects,dc=domain,dc=com"

QUESTION: in order to minimize amount of ACIs, how should I setup the 
described situation?
I have come up with the following options:

1. allow/deny
What is the correct way to use allow/deny because if I use default deny 
on ou=Projects..., it overrides allows.

2. custom attribute
Add a custom attribute somewhere and use that for ACI?

I could use some concrete examples. I couldn't find any relevant guides 
or I'm just blind. :) Thanks for help.

-Matti