Each Bijuu is assigned to ONE specific member. So its really one a piece.
Shukaku-Deidara case closed.
Matatabi-most likely Hidan. Heres why: Hidan was *****ing about not finding his Jinchuriki in the Rescue Gaara arc, and Kakuzu pretty much sat back and let Hidan deal with her, so its likely Nibi was Hidan's target.
Isobu-Tobi's target, actually captured by Deidara.
Son Goku-captured by Kisame.
Kokuo-unknown.
Saiken-unknown in the manga, Nagato in filler.
Chomei-unknown.
Gyuki-unknown originally, later Taka.
Kurama-Itachi, later Nagato.
So that leaves: Kakuzu, Orochimaru, Konan, and Zetsu.
Sasori was originally assigned to Isobu.
Deidara mentions there were 2 prior to Gaara, and theres an extra eye opened inbetween Gaara and Yugitos captures.
Zetsu most likely didn't get assigned a Biju as he was not a normal member of Akatsuki.
Pain likely didnt get involved with the Bijus while acting as the leader.
Which leaves Kakuzu, Orochimaru, and Konan as the ones to capture Utakata, Fuu, and Han.