Block specific users from submitting the form

Hi!
I wonder if there is a good way to block particular users from submiting the form. We have a spam filter and it works as it should (we user Flamingo to follow all spam messages). But is there an option to stop form submitting if we detect a particular pattern?

In our case, we have users/bots that fill in the [user-name] field with “crypto(…)”. We would like to block these from submitting. Do you have any tips how we could do it?

• This topic was modified 2 years, 6 months ago by tyte.