I checked in with our lead campaign developer about this for you,
He said there's no possibility to configure these parameters in Tracker Module. There's indirect way of changing the limits of spawned groups by setting the vn_difficulty variable, when it's undefined it's assumed to be of value 2.
The limits of the groups are:
- Sentries - 7 + vn_difficulty - alert 0
- Trackers - 9 + vn_difficulty - alert 1
- Patrols - 4 + vn_difficulty - alert 2
- Avalanche - 3 + vn_difficulty - alert 3
I hope this is helpful!