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Why can't he have his own license like Qt has? They have free version for individuals and paid version for commercial use.
The free version of Qt can also be used for commercial purposes - otherwise this would violate freedom 0. The paid version is for people who prefer different license terms instead of the imposed open source terms.
He could make a non-free (i.e., violating the four free software freedoms), non-OSI approved open source licence that does this, but it wouldn't be as permissive as you would probably want it to be, and it wouldn't be compatible with licences that are.
The free version of Qt can also be used for commercial purposes - otherwise this would violate freedom 0. The paid version is for people who prefer different license terms instead of the imposed open source terms.