Can I download InDesign from my creative cloud onto multiple computers? Using the program at a business
A Creative Cloud subscription is for one person working on two computers (like a desktop computer and a laptop computer), but not at the same time.
For a business, you could look into Creative Cloud for teams, or get multiple individual subscriptions.
If you are freelancer and working on site, then I suppose it would be okay to install on a work computer that you've been assigned.
I would make sure to sign out of Creative Cloud every evening before leaving.
The above would mean that you only had one active computer to begin with. The CC subscription allows two concurrent activations. If this is for your employer, I would suggest a subscription through that employer to avoid any issues with your personal subscription.