diff --git a/billard/tasks.py b/billard/tasks.py
index 092686d..6bcd39f 100644
--- a/billard/tasks.py
+++ b/billard/tasks.py
@@ -17,7 +17,7 @@ def process_location_data():
             # TODO Send error eMail to Admin
         else:
             cli = cli[0]
-            ac = models.Accounting.objects.filter(client=cli).order_by('time_from').reverse()
+            ac = models.Accounting.objects.filter(client=cli, desk_no=ld.table_no).order_by('time_from').reverse()
             if ld.on_off:
                 if ac.count() > 0 and ac[0].time_to is None:
                     ac[0].time_to = datetime.now()