Sorry to say the following but this will also end up dead like the two previous requests for this.
HERE is my request if you're interested...
I have several friends that know JS quiet well that tried to "break" into the engines code and
make it possible for us to do this with a plugin or whatever.
Most of them failed or got weird results, either Ashley doesn't want this feature because it causes issues with
certain parts of the engine or browsers cause problems so that Ashley is not able to implement that currently.
These are all speculations though because no one seems to care about this feature that much to provide us with more information.
I figured it would be something like this. It's really unfortunate because it's somewhat of a standard feature, and can be important for professional developers. How close where your friends able to get? I wish we didn't have to hack a solution but if one is possible I would be willing to pay for it.
I'm also not sure that it is a technical issue because people can do this in game maker just fine. I'll forward a feature request, but this really is not good for construct 2. It's ridiculous to have a game scale up so much on huge monitors, and I really need a way to prevent this.