Short answer. Yes.
To abstract this a bit, you'll need some form of centralized database that stores each users position. This isn't too hard, plenty of plugins that allow access to web hosted Databases. And construct 2 has an easy way to capture users geo location.
Then, you'll need to display that information. This is slightly trickier. Rexrainbow has a google maps plugin for Construct 2, so you could use that. Then you'd just need to download the coordinates, and display them.
That's the short abstract of how to do this. Actually implementing it, I don't think will be a small task. But certainly doable!