Does the Priv allow one to post directly to Facebook 'Groups' as you can on the Z30 or on PCs ?

I am in desperate need for a resolution to this because I have only 7-8 days to decide whether to order a Z30 or a Priv to replace the LG V10 they talked me into to replace my lost Z30. They have NO knowledge of or desire to sell BB and they keep none in stock, and the V10 clearly doesn't have the capabilities I find important!

You have full access to the Facebook app on Android, so yes.