Sending notification only to the HR taking over the Onboarding process of a specific Employee

Hello,

As it is described in the title, we are looking for a way to divide the notifications that are sent to the HR that have the same area of responsibility. Let's assume that we have 3 HR ops who have the same area of responsibility. In task level, we can choose the area of responsibility, and it will include all the population that are under that umbrella.

But the population is so big that our client would like to divide alphabetically the pending workers-employees so as the first HR ops will have the tasks from the last names starting from A-G, the second HR ops from H-O and so on.