Can I use the pfctl command in Terminal to throttle bandwidth?

The ISP I use (Northwestel) limits my upstream bandwith to 2 Mbps. While I upload at that maximum rate, the download service is disabled.
Plus, if I upload at that maximum rate for any sustained period of time (sustained being longer than about 5 minutes), my entire service is disabled and requires that I reset the modem to start it again.
As you can imagine, this is very frustrating. Especially when you consider I pay $125 a month for the service.
Very few apps offer an option to manually throttle upload speeds. Dropbox, for example, does. But Apple's PhotoStream does not.
So I'm looking for a way to globally throttle upload speeds on my Mac to a rate less than 2 Mbps so that I can avoid the above-described problems.
This has led me to the pfctl command in Terminal, which – from what I've read – would allow me to set an upload rate maximum limit in the Mac OS Mavericks firewall. The problem is, I'm a novice command line user and so can't figure out how to compose a command properly.
Does anyone know how to compose a pfctl command that would enable me to limit the upstream bandwidth rate on my Mac to about 1 Mbps?
Alternatively, is anyone aware of another way to globally set an upstream bandwidth rate limit on a Mac, perhaps a utility or app?
Any input or thoughts will be gratefully accepted.

There are gui apps for this. Apple has one.
http://apple.stackexchange.com/questions/7426/bandwidth-shaper-or-bandwidth-cont roller-app-for-mac-os-x
my give you some more hints.
http://www.justin.my/2012/10/how-to-limit-photostream-upload-speed-in-mac-os-x/

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Message was edited by: EZ Jim

Can I use the pfctl command in Terminal to throttle bandwidth?

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