Yes, you can do this, but you are charged for data forQuote from mtwokay:
I believe there's a way to setup two user names for one account.
Quote from krishiyer:
As one poster suggested IB stimulated is as good as original for feeding real time quotes to QT charting software. I have done it most of the time.
Lety us say you have 3 pcs linked thro router (single source broad band)& you can put the IP address of the main pc (where you are running TWS) in the other 2 pc's, your QT will run in all 3 machines. ( only limitation is how many symbols you are allowed by IB.