Problems with the filter panel

I have the following problem:
The filter panel shows to much data.
I tried to solve in the

security part of phprunner, but only ends of phprunner

error messages or wrong data in the (left side) filter panel
to simplify :

I have 2 tables

• user table with the fields : id_user, id_company, group
  
• task table with the fields : id_task, id_user
  Depend on the the group, I want to show the data of the
  
  table "task" like this:
  group : "customer" , show and add only own user data
  
  group : "customer_admin" , show, edit,add data from the same id_company
  Query is :
  
  select task.id_case, task.id_user, user.id_company
  
  where
  
  task.id_user = user.id_user
  Depending on the group, I modify the where clause of the
  
  listpage. id_user, id_company and group I saved at login
  
  in SESSION vars.
  In listpage, beforeSQL...
  if($strWhereClause!="")
  
  {
  
  $strWhereClause = $strWhereClause . " and id_company = " . $_SESSION["JK_ID_COMPANY"];
  
  }
  
  else
  
  {
  
  $strWhereClause = " id_company= " . $_SESSION["JK_ID_COMPANY"];
  
  }
  
  if ($_SESSION["JK_GROUP"]=='customer')
  
  {
  
  $strWhereClause = $strWhereClause . " and t_case.id_user = " . $_SESSION["JK_ID_USER"];
  
  }
  This works fine. But I have problems with the filter panel depending of the security settings.
  Now 2 things I tried :
  
  1)
  
  Filter panel ok, edit ends with an phprunner error:
  
  Unknown column 'user.id_company' in 'where clause'
  With the "admin" group the error dont occur.
  In debug mode I see : WHERE ( t_user.id_company=2 ) and ( ( t_task.id_task=9 ) )
  
  But for the key column only id_task is defined.
  In the securtiy PERMISSION part:
  
  group "customer_admin" allowed to edit table task
  
  group "customer not allowed to edit
  In security ADVANCED part:
  
  table: task
  
  User can see and edit their own data only
  
  User/Main table ownerID : id_company
  2)
  
  Filter is wrong, edit works.
  The filter shows all users of the table user not only
  
  of the listpage where I changed the where clause
  
  to show only from a company.
  In security ADVANCED part:
  
  table: task
  
  User can see and edit other user data
  And it getting more weird when I change the
  
  security of the table "user" to
  
  User can see and edit their own data only
  The filter panel shows insteed of the username the ids
  
  of the the other users in the table.
  What I need is that I only see the users in the filter panel from the listpage I changed the where clause.
  
  Is there a way to change the where clause of the filter panel ?
  Thanks for helping
  
  rg
  
  J.