Hello,

Unfortunately, it's not possible.
This could be done only with a custom php code directly in the registration view, but needs to have a minimum knowledge in coding this...

But this could be difficult to manage if you have hundreds of users... (IMHO an idea, but the question would be how this could be possible in a way (maybe not category) but in a simple way that works in all possible cases...)

Best Regards,
Cyril