well I will assume here that you want the last row of any relation for a client that has the same name.
YOu can first group on client ID
you can then create a formula field to try and make a distinct string for each relation. I am guessing at the structure here...
table.relation + '-' + relation.fname + '-' + relation.mname + '-' + relation.lname
if any ogf these field can be NULL make sure to change the formula to use defualt vlaues for Nulls
group on this formula field (group 2)
sort by your datetimestamp field (assuming you have one)
place the data you want to see in the group footer and suppress the detail section