user level authentication can be created with Data Bridge, there is an older tutorial on this written for security assist 1, but the concepts are the same in Data Bridge:
http://assets.webassist.com/solutionrecipes/securityassist_user_level_auth_sr.pdf
you would need to create separate pages for the individual fire fighters to see their own data based on the user ID that is saved at login and another set of pages for the admin s to see all data.
for basic help in creating recordsets we can assist you here through the forums, if you need more one on one assitance, we vcan help through a premiere support appointment:
http://www.webassist.com/premier_request.php