Yes. You are allowed to install the program on up to six machines per user operating concurrently. The registration and installation systems will track the number of machines on which the software is installed and will automatically limit the number.
Repeat installations on the same computer will not be counted as part of that number. Any attempt to override this limitation will result in user rights being withdrawn. There is no network licence option at this stage but this is something which is likely to be introduced in the future.