I’ve read many theological works on this and some say “yes”, I say “no”.  And theologians take Hebrews 12:1 concerning the great cloud of witnesses that are looking down.  I don’t think that has one thing to do with it.  And then over in Luke 15:7 there’s joy in Heaven over one sinner that repented.  I think that’s because the angels relay the message throughout the heavenlies.  The reason I don’t believe that those who are on the other side presently have this kind of knowledge is because we don’t get it until the resurrection of this body. See, we’re waiting for the redemption and salvation of the body, Romans 8:28. At the Rapture when He says, “Come up Hither”, Revelation 4:1 and we sweep through the heavenlies “in the twinkling of an eye”, I Corinthians 15:51-54.

Then and then only are we changed to be like Jesus.  “When we see Him, we shall be like him for we shall see Him as He is”, I John 3:2, then we get the body like Christ that has immortality in it where we’ll never again go back to decay.  Then we will have the mind of Christ.  “Now we know in part, then shall we know as we’re known, I Corinthians 13:12.  It’s only then that we have the mind of Christ – an all-knowing, omniscient mind, but not until then.  So presently, I would say they do not know what’s going on because Heaven would become hell if they could see what some of their loved ones are doing on earth.