An example of multiple criteria in a single rule: 

In public forms, a 'radio' type question can be used. This allows for a list of options to be displayed. 

However, since these options are public, it is not possible to relate each of them to a specific GLPI category from the public form.

With a business rule for services with multiple criteria, it would be possible to assign the specific category to the ticket generated from the public form, depending on the selection made in the radio options. All of this in a single rule with several assignment criteria