As of Android 6.0, you can individually manage app permissions for the PIA App and revoke them selectively.
Step 1: Settings
Open the Android Settings app and tap Apps.
Step 2: Applications
You will see a complete list of apps here. Tap on the app to go to the App info page for that app.
Step 3: Permissions
Scroll down and tap Permissions. From here, you can toggle on and off location permissions. Location permissions are used when enabling Automation within the app in order for the app to discover nearby networks for the automation process.