This will probably fail if you have merged cells in your table but it will get you started
Code:
Sub Macro1()
Dim iRow As Integer, iRows As Integer
With Selection.Tables(1)
iRows = .Rows.Count
For iRow = 2 To iRows
.Cell(iRow, 2).Range.ParagraphFormat.Alignment = wdAlignParagraphLeft
Next iRow
End With
End Sub