show ticket options on portal for customer segment

Hi all, 

I’m trying to hide the ticket options in the portal for all but one segment of our customers. I have these customers separated in to an “Admin” segment. I see a snippet to hide the ticket options alltogether, but not for a specific segment. I was given the placeholder portal.user.segment, but I’m not great as CSS and can’t figure it out! Can anyone help? 

the snippet I saw in another thread to hide tickets all together from the portal: 

#header-tabs a:nth-child(4){  display:none;}.footer-links a:nth-child(4){  display:none;}