Hi Alayna,
They are using bbPres ajax reply plugin.

Here is the link to the plugin
https://github.com/aliso/bbpress-ajax-replies

Please do note that it will work if you have threaded comments enabled.

Hope that helps.
Regards
Brajesh

Hi Ada,
Thank you. I have made a few more changes in the above function. This should finally do our job. Please check if it works or not?

function bcg_custom_forms_args( $args ) {

	$tax = $args['tax'];

	unset( $tax['category'] );//we don't need a box for category

	foreach( $tax as $taxonomy => $details ) {
		$tax[$taxonomy]['include'] = get_terms( $taxonomy, array('fields' => 'ids', 'get' => 'all') );
	}

	$args['tax'] = $tax;

	$cusom_fields = isset( $args['custom_fields'] ) ? $args['custom_fields']: array() ;

	$group = groups_get_current_group();

	if( empty( $group ) || empty( $group->id ) ) {
		return $args;
	}

	$cats = bcg_get_categories( $group->id );
	//if there is no category set
	if( empty( $cats ) ) {
		//create if not exists
		$cats = bcg_custom_create_group_category( $group );
	}

	if ( empty( $cats ) ) {
		return $args;
	}

	$cusom_fields['_bcg_selected_category'] = array(
		'type'      => 'hidden',
		'default'   => $cats[0],
		'label'     => ''
	);

	$args['custom_fields'] = $cusom_fields;
	$args['post_status'] = 'publish';

	return $args;
}
add_filter( 'bcg_form_args', 'bcg_custom_forms_args' );

Thank you
Brajesh

Hi Leo,
It is not impossible one. It is related to physically moving files to make sure the quotas for users/groups reflect correctly. I am a little bit busy with some other important changes, that’s why it is delayed. It will be available in next 2 weeks for sure.

Thank you
Brajesh

Hi James,
Thank you for the kind words. I am glad we were able to help.
All the best with your project.

Regards
Brajesh

Hi Brendan,
Thank you for posting. Can you please point me to the plugin you are using to restrict categories. I will need to add compatibility for the specific plugin to make it work together.

Thank you
Brajesh