BuddyPress.org

I am trying to create some integration between a jobberbase script install and buddypress members. In other words, I want only members of my buddypress community to be able to post jobs on the jobberbase page.

One way someone suggest I should do this is to look for any cookie generated when a member is logged into the community and only then let them access the job post page otherwise redirect them to the buddypress signup/login page.

I would like to know:

How would I access and use the necessary cookie?

Could anyone help with the code I would need to use? I am not very familiar with php

Thanks for your help!