Is it possible for two people work on the same Indesign document?
Unfortunately InDesign has no realtime collaborative working feature.
If you need to work in a magazine or something like this that usually sports several people working at the same product, things you can do are:
Split up your work into multiple INDD files, eg. one file per story. Then merge the individual files into an InDesign book.
And now in CC we got InCopy, in which you edit stories without actually having to open the InDesign files.