APP Control and Reporting - SQL Query

Hi,

we would like to limit the total number of Apps per user to 20, which is not supported by SMC.

Is there any trick to make it work manually, i guess not.

Does anybody know how to run the following SQL Queries:

1. 1) List of users with number of APPs higeher than X numbers.
2. 2) Get a list of Mac Adresses of Wireless Card interface.

I Thank you for any help.

Kind Regards
FK