[xwiki-users] Hide (don't show) some macros in WYSIWYG insert macro menu

Hi XWiki Team, I would like to hide some macros from the user, in the list presented on the WYSIWYG editor menu "Insert Macro". How can I do that? The matter is only hiding some of them from the user, to prevent him/her to select it to use on the page creation. Some of them are not familiar to my users, and I would like to "disable" the possibility of use. How can I do that? And also, is it possible to show those hidden ones only to the admin or the admin group, or a specific group? I'm using XE 3.0 Regards, Ramon Gomes Brandão