Oh, I see, you want all the following text to be flush right. Yes, that's a slightly more complex trick.
I am not sure it can be done with a single paragraph style — a best-case solution would be to use one style for the first line and one for any further indented lines.
I don't think GREP can find leader dots (they sort of "don't exist" in the text flow). However this seems to work:
- Character Style NUNNY — set text color to None.
- GREP Style search for \n\t
Any soft-return/tab combo is set to no text color, or invisible. That's pretty wonky, except for print and PDF export, so no guarantees in any other usage. The tab and the leader dots would still exist, which might cause other odd problems (as with TOCs, cascading formatting, etc.)
I can't help but think there's a better solution; perhaps someone else has a more fundamental way to get this text arrangement without the fix-up.