The clans cant control every single clan because tey are not bound by a single government. What most of the clans are bound by is a hate for DB and the sentinels. The apartment building attack was never proven to be clan, and if it was clan, was Dust Brigade, even though it would not profit them to blow up an apartment building. Back when it happened I wrote a long post about who it would profit and who it would hurt and most of the profit came to OmniTek. It gave them something to bring out in seemingly every political discussion. It makes the clans look like terrorists, which almost of all of them are not. It gave them an excuse to do what you are trying to do- police the clans. But that is not the topic of this discussion. The clans cannot police the Dust Brigade because the DB is an enemy to most clans as well as OmniTek and the neutrals.
In any case, there is nothing (that is valid or legal) that says OmniTek has any right or authority to police the clans, so no, OmniTek is not the people to do it, even if the clans are having a hard policing themselves. The only ones who have a right are the Clans and if the Clans agree, the ICC.
And about the clans assaulting 2ho, you have got to be kidding, right? OmniTek assaults clans bases all the time and the clans assault OmniTek bases all the time. You have noticed the notum mines that have gone up and the battles over them haven't you? Attacking 2ho should not even be brought up.