No. An unbound control has only one value for the entire form, so cannot
have different values on different rows.

Assuming you have a split database, you could create a table in the front
end and store the primary key values of the records the user selects. The
RecordSource of the form would then be a query that contains the original
(shared) table, with an outer join to the local user's table. In the query,
you could create a calculated field:
   IsChecked: ([MyLocalTable].[MyPK] Is Not Null)
Then you could represent it with a checkbox in your form, and overlay it
with another unbound control that does nothing except respond to its Click
event to Execute an Append or Delete query to add/remove the record from the
local table.

I believe MVP Albert Kallal has something you may be interested in.
Go to his site here:

http://www.members.shaw.ca/AlbertKallal/msaccess/msaccess.html

Look for the download file called "Multi Select Example."

I'll look at that! that's cool
thanks again for your help!!!