Setting up assignment extensions for 1 student

Hi all,

Hope you can help; is there any way of setting up an extension for 1 student on a particular module without the rest of the students on that module seeing it? Currently when I set up an extension the entire module can view it so we get panicked calls asking if it's for them.

We use Moodle 2.4.3+, any help would be very gratefully appreciated!

Many thanks,

Claire.