Service desk configuration

Dear experts,

i configure service desk successfully(windows 2008 rs,soultion manager 7.1,SQL database support.package 04). i able create message from sateillite systems  and it has been receiving solution manager.But my requirement is

A is MM user

B is SD user

If client raise message regarding MM related issue ,it should be reach user A only

If client raise message regarding SD related issue ,it should be reach user B only

C user can manage both user(A and B)

Is it possible? please help me to solve.

Warm Regards,

Prabaharan B