You can remove members from an Options policy similarly to the method for adding members, for both Teradata and native schema.
Substitute the remove: attribute for the add: attribute shown in Adding Members to an Option Policy, and remove the unneeded members.
For example:
dn: cn=has-policy,cn=options,cn=policy1, cn=tdatrootP,dc=domain1,dc=com changetype: modify remove: member member: cn=behind-the-firewall,cn=internal-network-groups,cn=policy1, cn=tdatrootP,dc=domain1,dc=com