From the Autodesk EULA:
Section 3. Permitted and Prohibited Actions
3.1.2 Additional Installation.
Except with regard to Educational Institutional, Student and Evaluation Versions only, You may Install and Access a second copy of the Software on the hard disk of a second Computer owned by You or under Your control provided that:
(i) the original and second copies are used only by the same person;
(ii) the second copy is Installed and Accessed only on either (a) with respect to Network Versions, a redundant server that makes the Software available for use only when Your primary server on which the active Software copy is Installed becomes inoperable, or (b) a notebook computer or other non-server computer away from Your usual work location for the purpose of enabling You to perform work while away from Your usual work location;
(iii) only one of the Software copies is Accessed at any one time; and
(iv) both copies of the Software are Installed and Accessed exclusively with the copy protection device (if any) supplied with the Software