Open source and intellectual property protection. Is this combination possible?

Question

Copyright

Open source is for that and open so that it can be read and improvements made to it (to the program). But the open source implies that any ghoul can compile "his" such program with red buttons instead of blue ones.
Is it possible to protect your program from attempts of such copying, if the project has commercial value, but, moreover, is open. Or is it mutually exclusive in our world?

Answer 1

Do not confuse the openness of the code with the freeware of the program.
Open source is needed to be freely copied, edited and used.
That is, the code is opened precisely so that every ghoul can compile "his" such program with red buttons instead of blue ones.
And the protection of a particular software product from unauthorized use is carried out either by law or by technical means.

Answer 2

You can post the code to the public, but write in the license that all modifications must be available to the author of the program and cannot be used in the commercial sector.
In general, you are free to set the conditions for using your code.
Another question is that once you expose the code, it will be very difficult for you to track its use by third-party developers in your products, and even if you find out about such use (when your license is violated), do you have enough strength, money, time, etc. in order to force a person to comply with a license?