Probably not possible with the stock firmware. If it were a router you could put OpenWrt Linux
on it and go to town. Not with the regular old web based control panel, anyway. Stuff like that is usually reserved for Cisco's commercial routers and switches on IOS
(not Apple's iOS
aren't very useful.
Also, do you mean bandwidth limiting as in speed, or in total volume of data transferred? Because for the former, you might be able to force Base10 mode or something...