Did you turn on track changes? Does this text have some attribute that sets it apart from the rest?
InDesign has no ability to select non-contiguous text. What might work, however, is to use Conditional Text and mark your edits with a condition, then hide any text not marked.
If there is something unique about the edited text you can use Find/Change to mark it with the condition.
Sir BobLevine: I only edit the text which is written/typed using only one kind of font and size.
Sir Peter Spier: But how do i use Conditional Text and mark my edits with a condition and then when finished — hide any text not marked?
Could you please give me a step by step guide for this process? I would be very glad.