[TYPO3] typoscript condition for specific be_user in frontend editing

[Zachary Denison]

Hello,

I am trying to implement something on my site to show up only if a
backend user is logged in (actually its a logout button which I use
for certain editors who only edit from the front end).  I would like
to disable this for certain backend users.

I know how to check if a backend user is logged in in general:

[globalVar = TSFE : beUserLogin > 0]

But how can I check for a particular backend user?  It seems that
loginUser is for front end users.

Thank you.

Zachary