You can sort by any usermeta key, such as first_name. You can sort by a specific username (username=”bsmith”), but no, you can’t make a user “sticky” at the top…. not a bad suggestion though for a future release… Yes, you could use groups to create a custom set of employees to display. You’d need the paid version of Simple Intranet though to allow you to Create Groups in the Users menu though.
I’ll assume you saw this below in the Simple Intranet menu?
– To add a searchable employee directory to a page or post, insert the [employees] shortcode. Limit to 25 employees per page using the limit parameter, display the search bar above the listing with title and department search options, exclude “board” and “executive” custom groups (use slugs) from search pull-down, set avatar pixel width to 100 and display only Subscriber roles as follows: [employees limit=”25″ search=”yes” title=”yes” department=”yes” search_exclude=”board,executive” avatar=”100″ group=”subscriber”].