From filters.txt:

Quake 3: Arena\PunkBuster
Group: NUL

Quake 3: Arena\PunkBuster\On
Mutex: Q3PB
Group: Q3PB
1 if sv_punkbuster != "1" remove

Quake 3: Arena\PunkBuster\Off
Mutex: Q3PB
Group: Q3PB
Flags: OTHER

Quake 3: Arena\BattlEye
Group: NUL

Quake 3: Arena\BattlEye\On
Mutex: Q3BE
Group: Q3BE
1 if sv_battleye != "1" remove

Quake 3: Arena\BattlEye\Off
Mutex: Q3BE
Group: Q3BE
Flags: OTHER