Toad for Oracle is licensed per seat. If using in a VDI environment, Toad licensing will look at the person using Toad.
One person per one Toad license seat.
The “per seat” definition is taken from our Licensing Guide available from the following link: Licensing Guide
For each Seat license granted, one individual user shall be authorized to install the Software on one personal computer or one portable device, and (ii) use the Software solely for the benefit of Licensee, unless otherwise set forth in the Agreement. In the event Licensee installs the Software on a network storage device, or a virtualized or shared environment (such as a Citrix server), a Seat license is required for each individual user that may access and use the Software. For each additional device or individual user that accesses and uses the Software in excess of the number of devices or users permitted herein, Licensee shall be required to purchase additional Seats.