aNag acknowledgement action


I am currently testing aNag per my boss request and I can’t really find one particular feature needed by my boss: acknowledgements made by specific user. We connect to our Icinga using api user and proper ssl certificate. We would like to be able to make acks as a specific user - i.e. mister X has 24-hour duty and he needs to make acks as HIM. How do we achieve that with aNag or is there any alternative?

Thank you,