Is it for Triggering unit's allies you want the Floating Text to show ? :S
In that case, use this
Trigger:
Floating Text for Local
Events
Conditions
Actions
Set TempPGroup = (All allies of (Owner of (Triggering unit)))
Floating Text - Create floating text that reads Hello! above (Triggering unit) with Z offset 0.00, using font size 10.00, color (100.00%, 100.00%, 100.00%), and 0.00% transparency
Floating Text - Hide (Last created floating text) for (All players)
Floating Text - Show (Last created floating text) for TempPGroup
Custom script: call DestroyForce(udg_TempPGroup)
For the Special Effects, you should probably read this, as it's a bit more complicated
Ghan has said he has fixed this. Monovertex please confirm this fix. This was only a problem with people that had signatures in the upper levels like not the special members but the respected members.