Actually, you can not look up your own status, could cost you your job! The reason is simple - when you are at work, you are an employee and therefore do not need to look up your status to do your job. Therefore, if you want to know your status, you would still have to follow the regular channels like any other applicant. Now, being a federal employee, you(or a co-worker) may have a contact who works for immigration and could help you in that instance as a professional courtesy.
I work in healthcare but I am not allowed to look up my own records or even that of my spouse, neighbours, etc just because I want to. They tell us the question to always ask yourself is, "do I need to know to do my job?" If the answer is not 'Yes', then you shouldn't access the records.