Perhaps a silly question, but why provide an IFC at all if you seriously worry others might copy your design?
If your design is any good, of course others will copy it! and so they should - just as 98% of what you do is copied or heavily derived from the work of your peers and predecessors down through time.
Imagine if my early ancestor copyrighted the idea of "roof"? Is it reasonable to expect no one else to imitate this? Surely it is your skill in tailoring a specific solution to a specific client in a specific context that is what you offer? - a design outcome you have put together for a specific project (using a specific combination of the ideas of your forebears) is like a fitted suit - not so useful to anyone else if simply copied verbatim
An IFC is useless to anyone if it cannot be manipulated. If no ability to edit individual components is what you really want, perhaps just export your project as a dumb 3D format like 3DS?
Octane Render Plugin for ArchiCAD
Intel Core i9 10900K
Nvidia Gforce RTX 3080
32 Gb DDR3
2x4K 42" monitor extended desktop