torrent client traffic shaping question

[Brent Clark]

Hiya

I got this question to ask, and I was hoping the TCP/IP gurus would be
able to help me understand this.

K you know how with traffic shapping you can control only the traffic
leaving you, how it is that torrent clients say they can control the
download as well as the upload. I would think the client can only
control the upload.

TIA

Brent Clark