. example if i add user

msk besut ,
msk dungun ,
mrt besut ,
mskl sabah , and other example 100 name user have besut,dungun,

and then i save it. and then i add custom field select box at option i add
-besut
-sabah
-dungun

so when new ticket user can assign to choose have besut example.
so at assignt ticket to just
-msk besut
-mrt besut.

can do you do it that?