I have a solution. If you have a drop down that pulls in for example a list of users from the db and you wanted to default the current user.
pass the default user as a second condition into your query. Then sort it based on a match of the userid.
IE:
select userid,
(last_name +', '+first_name+' ('+userid+')') as combo_name,
(case when userid = '%USERID%' then 1 else 0 end) as def
from ca_contact
where userid is not null and userid <> '' and inactive = 0 and last_name <> '' and first_name <> '' and Last_Name+', '+First_Name +' ('+userid+')' like '%LAST_NAME%%'
order by def desc, combo_name
Now that the targeted user id is at the top of your list all you need to do is default that select by setting selected index to 0.
The dropdown now not only searches but it also defaults the current user.
Cheers!