You could do a top N statement by using Add Command and entering something like:
select top 3 table.`date`, table.`user ID`, table.`memo`
from table
where table.`user ID` = 123
order by table.`date` desc
Or you could write a conventional report where you limit the records to one user in the selection formula, sort in descending order by the date field, and then use a suppression formula on the detail section of:
recordnumber > 3
-LB