If you want to set access controls that allow access to a number of entries that are spread across the directory, you might want to use a filter to set the target.
In LDIF, to use a filter to allow all users in HR access to employee entries, you would write the following statement:
aci: (targetattr="*") (targetfilter=(objectClass=employee)) (version 3.0; acl "HR access to employees"; allow (all) groupdn= "ldap:///cn=HRgroup,ou=People,dc=example,dc=com";)
This example assumes that the ACI is added to the ou=People,dc=example,dc=com entry.
Because search filters do not directly name the object for which you are managing access, try not to allow or deny access to the wrong objects. Unintentionally allowing or denying access to the wrong objects becomes more of a risk as your directory becomes more complex. Additionally, filters can make it difficult for you to troubleshoot access control problems within your directory.