So I understand that data transfer is not done via online services, but can BitTorrent Sync be used entirely locally?

For example, I have a desktop at home, one at work, and my laptop.

I would love to have my music collection available all the time on my work desktop, but I don't want to waste the bandwidth at the office.

My ideal use case would be that while I am at home, my laptop and home desktop sync across the LAN, when I get to work, my laptop and office desktop sync.

Does BitTorrent Sync allow that?