Hello Sergio,

Thank you for the posting. Please use the following code:

add_filter( 'mpp_user_can_upload', function ( $can_do, $component, $component_id, $gallery ) {

	// Only allow uploads to the user's own galleries.
	if ( 'groups' === $component && get_current_user_id() != $gallery->user_id ) {
		$can_do = false;
	}

	return $can_do;
}, 10, 4 );

Please let me know if it helps or not.

You can use this code in your active theme “functions.php” file or “bp-custom.php” file.

If you do not know what is bp-custom.php file. Look at the following link:
https://buddydev.com/docs/buddypress-guides/what-is-bp-custom-php/

Regards
Ravi

Hello Sergio,

Thank you for the acknowledgement. I am glad to help you.

Regards
Ravi