Here's what I think are the ones you had as a ? mark:
Kabal: Netherealm
Kobra: Outworld
Kira: Earthrealm
Scorpion: Netherealm
Noob/Smoke: Netherealm
Raiden: Earthrealm
I'm probably wrong, just depends on how well you know the characters background I guess.
As for the rest, I'd say you made a good guess, but I don't know for sure.

Since you said the ones in red are the ones you were certain of, I've taken care of the question marks and the ones in white for you.
Kabal was an Earth warrior. Therefore he's from Earthrealm. So are Kira and Kobra.
Raiden is from the Heavens as he is a deity.
Smoke is human underneath the robotic armour and so is from Earthrealm.
Scorpions origins were once human but now he's a spectre. His origins I guess you could put Earthrealm/Hell. The same can be done for Noob, except you replace hell with the Netherealm. Though Scorpions origins might also be from the Netherealm.
Jade is definitely Edenian, as is Tanya.
Bo Rai Cho and Mileena are Outworld born. Though remember Mileena was created.
Darrius I believe is also from Orderrealm. He just wants to oppose that order. Dairou is from Orderealm.
Liu Kang is from Earthrealm, as are Kenshi, Sub-Zero and Nightwolf.
And finally, Li Mei is from Outworld.

Tanya's from Edenia, Dairou and Darrius are from Orderrealm, and Nightwolf is from Earth.

this is how it is:
raiden-heavens (he protects earthrealm. he was not born there)
scorpion-earthrealm
sub-zero-earthrealm
shujinko-earthrealm
kenshi-earthrealm
nightwolf-earthrealm
liu kang-earthrealm
smoke-earthrealm
kabal-earthrealm
kira-earthrealm
kobra-earthrealm
onaga-outworld
shao kahn-outworld
goro-outworld
ermac-outworld
bo'rai cho-outworld
li mei-outworld
baraka-outworld
mileena-outworld
sindel-edenia
jade-edenia
tanya-edenia
noob-netherrealm/sub-zero-earthrealm
ashrah-netherrealm
darrius-orderrealm
hotaru-orderrealm
dairou-orderrealm
havik-chaosrealm
(motaro(rumours)-outworld)

Tanya: Edenia
Kabal:Earth
Kobra:Earth
Kira: Earth
Scorpion: Earth
Noob-Smoke: Nether/Earth
Raiden: Heavens
Nightwolf: Earth