There are a number of options. You can't use the check box field in networked database as each user will see each other's selections and a find finds all the records so "marked" by all users instead of just the current user.
How long do you need to "save" these selections?
Should the selections persist after the user closes the file or do you just need these selections retained until the file is closed?
You can "mark" fields as selected for the current user only by storing the ID numbers of the patient records in a list in a global field or global variable, but these choices will not persist once the user closes the file. You'd need to save this list of ID's to a table where you have one record for each account name if you want the selections to persist after the user closes the file.
Thanks again for your help!