Since the guide previous isn't much of guide as "tips" and couldn't prevent missing the one I did, heres one thats "actually" completion useful.
***CREDIT TO POWERPYX.COM***
Here are the names of the targets and where you kill them:
-Aiper Erdal: Mining Town Map
-Amin Nabiyev: Automatically killed in Act 2, main mission "Remains of The Day".
-Capt. Abel Dadiani: In front of the maze entrance during Act 3,
main mission "Labyrinth".
-Capt. Dorofrey Ketsba: Dam, coordinates 26.07;12.00
-Capt. Ioseb Pogodin: Mining Town, coordinates 24.12;21.97
-Ivan Krustchev: Automatically killed in Act 1, main mission "Blackout".
-Dr. Darya Kuznetsov: Village, coordinates 26.41;16.42
**Available to be killed during Side Op "Burning Bridges II",
After you clear out the command room, she will be a cowering
civilian in the room to the left. Easier than infiltrating
the whole base just to take her out individually.**
*Credit to me for that tidbit of information ;)*
-Grivapsh: Mining Town, coordinates 24.32;18.83
-Joost Arends: Dam, coordinates 29.92;11.80
-Lev Trapsh: Automatically killed in Act 3, main mission "Party Crasher".
-Lt. Boris Druganin: You run into him during Act 2, main mission "Awa's Family'
He's an optional kill in this mission, you'll have to eavesdrop
on him and can take him out afterwards.(within the confines of the mission that is)
^^^^^^^^^>The one I missed. Dont Miss It!!! Kill him before ending the mission!
-Lt. Era Baris: Automatically killed in Act 3, main mission "Slaughterhouse".
-Medea Janashia: Dam, coordinates 25.74;13.57
-Stephan Chbaarta: Dam, coordinates 28.73;14.77
-Tanya Ratsba: Mining Town, coordinates 23.08;19.17
-Vladislav Bagapsh: Village, coordinates 27.89;12.06