Hola,
Nada te impide recorrer los componentes de un determinado panel, o sea, algo así:
Código Delphi
[-]
procedure TForm1.Button1Click(Sender: TObject);
var
i,j: integer;
begin
for i := 0 to Self.ComponentCount-1 do
begin
if (Self.Components[i] is TPanel) then
begin
for j := 0 to Self.Components[i].ComponentCount-1 do
begin
if (Self.Components[i].Components[j] is TEdit) then
begin
end;
end;
end;
end;
end;