How to lock cells

ok I ask mr google how to lock selected cell in ms access 07 like excel do.... i only get the "How to lock the worksheet" thing... i cant figure it out... i have my records in table1, created a form... what i want is i want to protect table1 by locking selected cell so that no one can edit it, for example field 2 protected you cant edit it, field3 unprotected you can edit it... like in excel its what you called protect sheet but u can unlock some cell you want to edit, does ms access have this kind of features too? i only know is when you open a data base it will prompt you a pw... but still can edit cells...

hope you understand my point.. kindly help..

thanks in advance....