Sharing total bandwidth equally between ips

[Rajkumar S]

Hi,

I have a requirement where I want to share the available internet
bandwidth _equally_ between all active ips in the LAN. For example if
I have 2 mbps and only 4 ips are active, they all should get 512, but
if 4 more ips become active, every one should get 256kbps. This should
work even if one of them is using a download manager and has multiple
connections to server.

Can such a requirement be met with pf? I would be happy with an
approximation of this requirement. The underlying philosophy of this
requirements is that "smart" people using download accelerators should
not overwhelm moms and pops.

Thanks,

raj