Delegation of Address List for SMTP VIP

Our mail administrators currently manage IP lists on our SMTP servers for who is allowed to relay email within our organization. We'd like to move the SMTP servers behind our F5 (running version 16). Since this will be a one-armed config, the IP lists on the servers will no longer be respected. I am wondering if there is a way to only grant the mail admins access to manage the address list on the F5 and apply that to the VIP or if there is a way for them to manage an external address list that can be imported or called by an iRule?

Thanks,

Rob