[wordpoints_points_logs] query limit?

Hello, first of all thank you so much for doing this useful plugin.

I would like to know if there is a way of do_shorcode like:
[wordpoints_points_logs query=”current_user” show_users=”0″ paginate=”0″ searchable=”0″ limit=”5″]

Add a limit for retrieving just the last 5 logs?

If this can’t be done by shortcode can you give me a clue of how to do it with a PHP function?

Also I would like to know if is possible to get the wordpoints_points_logs by user ID?
Something like:
[wordpoints_points_logs query=”$user_ID” show_users=”0″ paginate=”1″ searchable=”0″]

Thanks so much for any help. ??