I have installed grive for my Google Drive integration in Ubuntu 12.04, Can I to add multiple google accounts with multiple grive instances? I'm doing something similar with Dropbox then I would think that I can do the same with Grive.
You can't do it with the GUI, but it is really simple with the command line:
I'll assume, for the sake of my explanation, that you want to create a repository for your private data and one for your work data.
1) Open a new Terminal with CTRL+ALT+T.