From the FAQ:
Can I use the software I download from Creative Cloud on multiple computers?
Yes, you can install and activate Creative Cloud desktop applications on two computers, regardless of operating system, for use by the individual associated with the membership. See the product license agreements page for more information.
If 2 people need to use the apps they'd each need their own membership.
If, for example, I had InDesign open on one machine can it be open on the other machine as well?
The second install cannot be in operation at the same time as the first.