I've a simple (2PC with ethernet cards)network.
My client PC (vlc) IP address is 192.168.0.253 & Server PC (DD) is 192.168.0.1. This is my PC to PC connection.
I dont have a modem with router, mine is usb with no ports.
So you have a host-to-host network (the 2 PC are linked by a cross-over LAN cable and are configured with statics IPs) with one of your PC sharing his web connection (the PC where your USB modem is plugged).
I guess that you've used Windows' Internet Sharing Wizard which has created a bridge-connection between your ethernet card and your USB Modem network interface.
First of all, we should say, that this configuration requires system ressources on PC that acts as server for each data packets transfered between client PC and web connection. In conclusion, it's not safe for the server PC's performances and this can cause lacks in data transfers if the server is high-loaded.
Then, we should consider the fact that Windows' Internet Sharing function does not manage network bandwith as well as a router does.
When I checked I saw that DvbDream uploads from my adsl network too (I've checked with netlimiter)
I don't understand what you wrote ?!? Especially this : "uploads from" ? We can download
from or upload
to (ie : a web server) but we can't do it the other way
How can I use my internet while watching DvbDream

Is Microsoft QoS activated on all of your network connection's property page or not ?