Domain admin restrictions

Hi,

I hope I can make my request clear.

We manage many separate companies all using our FTP solution.

Each company has multiple offices in EMEA.

Each office has an IT person.

In our Serv-U server, we have implemented multiple domains, one for each company.

Is it possible for an IT person to be a domain admin but have access to their office without having access to the whole domain?

Make sense?

Thanks for your help.