I have two answers fot you:
No, it's not possible and...
Yes, it's possible.
First: AI is AI, therefore completly stupid. So, if you want the AI to call the actions by themselves - as if they had their own will - you might want to get OFP's source code...
Second: Sure, AI can perform the actions, as long as the player asks it to do so. The player chooses a unit in his/her group - F1 ~F12 -, opens the Commands->Actions menu (is it 6?) and presses the action number. Then, the AI will activate the script that is associated with the action and, thus, become the one of the arguments. A far as I remember, the arguments returned are: [action attached to whom, who activated, action index]; you should confirm, though.
I hope the explanation fits your purposes.
#Edit - Note:
Well, uiox sugests trying the 'action' command, but, as he supposes, I think that it's available only for a few hard-coded actions, too.
Thus, Sui's solution is the best - your script just needs a bunch of conditions, a waipoint for the unit and the virtual action.
#Edit 2 - Note:
Just occured:
If you attach the action to an AI unit, either the player or other unit could activate it, so, I think that the AI is able to activate an action on themselves - like the common "Lower Goggles" action that we're used to.
Long live the community!