Prevent slave from assisting the master

[tanknspanker]

Hello!
Is there a possibility to prevent couple of slaves to assist the master?
for example, I want to prevent my healers from assisting so I dont get them wander off to the enemy's..

Greetingz!

[tanknspanker]

Wubsie helped me out on this one!
for people who want to know this: In the keymap (non-combat) assist me, you can change from target--> all w/o current to --> (action target group) dps's

credits to wubsie!