Do note that in Europe these have been (severely depending on where you exactly live) restricted. In my case for instance you need an objective reason to limit

Do note that in Europe these have been (severely depending on where you exactly live) restricted. In my case for instance you need an objective reason to limit someone from having other employment which is quite restrictive in what you can limit as an employer. There is no case law yet (as it's very recent) so we will see what happens in practice.