Monitoring activity level of individual connections inside a Windows network bridge?

I have 1 Windows machine in my house and 7 in the garage. All do a lot of internet access (for Boinc - scientific research over the internet). I'm hitting the limit of my fibre connection 24/7 (32 down 7 up) until such time as I get full fibre (1000 down 220 up). Currently I have no way of seeing the total internet usage of all the machines. The router does show a total value for each machine, but it's not live, it's just a total amount updated once a minute, and I'd have to add them all up and subtract the difference over a period of time. So I had the bright idea of creating a network bridge on the computer in the house. The internet router now only feeds the house computer, and the house computer then has a second ethernet connection to the garage machines. I thought in the task manager I would be able to see each of these two ethernet connections on a seperate graph and easily see the traffic, but the stupid thing just shows total bridge traffic, so for example if a garage computer uploads at 5 Mbits, I see both up and down on the bridge as 5, if it downloads at 5, I still see the same 5 up and down. I can't even see which direction it's going! Is there a way to make it split them, or an app I can download which will do so?

For some reason this forum won't let me edit my own post!

So I'll add it here - what about a simple router/switch I could place after my ISP router which I can access with a web browser and shows traffic? Anybody know of one with this function? Not too expensive please. I'm thinking under 50 dollars.

Sorted it myself. If anyone's interested - performance monitor still monitors the two connections in the bridge seperately. It may be possible to display it in there, but since I already use MSI Afterburner, I can import it into there. I now have a seperate graph for each of: upload from any machine to internet, download from internet to any machine, upload from garage machines to internet (or to the house machine which is rare unless I'm installing stuff or transferring files), download from the internet (or from the house machine which is rare unless I'm installing stuff or transferring files) to garage machines.