Thank you for the question @Anonymous, and welcome to the Autodesk forum!
What is allowed, can vary depending on your subscription type. Information on this is available here: Subscription Types
As mentioned in the link above for the most common Single User subscription type, “…may install Software on up to three (3) Electronic Devices; however, Your Authorized User may only use the Software on one (1) Electronic Device at a time.”
It does note “The Authorized User must log in using his or her Autodesk ID to install and/or access each Offering…,” but does not mention needing to sign out when using a different system.
Lance Coffey
Technical Support Specialist