Detect number of users wireless online?

[defensieforum]

Because I can't update to 2.0 on a short time I have modified the imode version of SMF 1.1.14 for my users as can be seen at the adress below:

http://m.defensieforum.nl (forum is ducht only)

Is it possible to detect how many users are wireless online at a certain moment? I know the number of users online in total, but would like to know how many users are using the wireless mode...

Regards,

Peter