Hi, I am a developer in Australia and working in I.T. for 20 years. It has been my hobby to do freelance works. I have various experience with desktop and web applications during the course of my stay in I.T. I have been involved with different inventory, purchase orders, payroll, and other company applications.
I am not really bidding for your project, so i placed the lowest amount possible, but just want to help you out. I don't mean to offend you or anything, but have you Googled your requirements?
Access applications are not really meant to be that "secured". Apps built on MS Access are more for personal use really. I would suggest have the Access as the back-end database then have the main desktop application developed in DotNET. This way, you can have the more secured application.
Should you need further discussion, you can drop me a message here in Freelancer and we can workout more about your project.
Thank you.