From the License.rtf file
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Autodesk grants You a non-sublicensable, non-exclusive, non-transferable, limited license to use copies of the Software in the jurisdiction in which you acquire the Software, in accordance with the applicable User Documentation, within the scope of the License Parameters. Autodesk’s license grant is conditioned on Your continuous compliance with all license limitations and restrictions described in this Agreement. If You violate any of these limitations or restrictions, the license grant will automatically and immediately expire.
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You may not distribute, rent, loan, lease, sell, sublicense, or otherwise transfer all or any portion of the Software or User Documentation, or any rights granted in this Agreement, to any other person without the prior written consent of Autodesk.
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This is a pretty easy answer, just read the fine print. Legally, you can't give Inventor to anyone else (without Autodesk's consent), period. You can't "donate" it either. At least they are nice enough to allow multiple installations for the same user. Micro$oft office is officially licensed to the processor of the computer on which it is installed (not the user), meaning it can only legally be installed on one machine.