If you'd like to work with multiple companies in Podio, or perhaps would like to create a separate area for your personal projects, then you can create a separate organization in Podio.
This can be done with just a few clicks. Click the profile icon in the top blue bar, then select "Create another organization".
Fill out the information on the next screen, and then you're all set!
Note that this new organization will be completely separate from any existing organizations where you're already a member.