We have a group password policy feature that allows you to define different set of password policy requirements for each group of users within Okta. You can work with our support team to get this feature enabled for your Okta org.
Alex - Password policies can be applied at the group level. Please let us know if you would like us to enable this feature for your org. More information can be found here: https://help.okta.com/en/prod/Content/Topics/Security/Security_Policies.htm