Question : Log on ID and pw

Hello, I think that I am going to have to have an ID and pw to log on to the db.  I want this functionality mainly to "see" who has changed data in the db or added data.  Is this possible?   Maybe further explanation might help.  I have a newly created db and just put it on the network.  I also have a very disgruntled employee who is very "intimidated" by this new db and I am sure would want to harm it.  I think this person has intefered with the integrity of the data but I am not completely sure.  If I had an ID and pw setup then maybe I could run some kind of report for ID to see changes?  Maybe this is out of the scope of Access.  

thank you

Answer : Log on ID and pw

the codes that was posted is called from a single form. so you just have to do it per  form you want to track changes made.