Message Approval to group, different moderator for different sender

Hi all,

I am facing a very troublesome request by users about having different moderator for different sender for an email group containing all users.

scenario:

email group: all_users. it contains all the email users. not everyone allow to send to the group. only some users from each department are allowed to send to this group.

if a sender from HR department is sending the email to the email group all_users, only the moderator from the HR department can make decision on the approval process.

if a sender is from IT department wants to send email to that email group, only the moderator from the IT department can make decision on the approval process.

anyone knows if it is possible to have such setup for the email group about the message approval?

thanks so much.