[pmwiki-users] auth condition for auth groups

[noskule]

hi list
I'm looking for a way to build a condition that fits all users in a 
given group, something link

if authid @Authors

is there a way to do this.

Currently I use a page Site.Authors and set the read permission @Authors 
so I can use
    if auth read Site.Authors
but for that I need the Site.Author page what I'm would like to avoid.

thanks for  any hints
nos