Are you referring to firing Workflows from a Helpdesk incident screen?

I referring to firing it from an item action. like selecting a computer and right clicking and having it do something.

In that case... yes... I'd expect it to only work on a one by one basis.

Is this what you want to do:

Create a Dialog Item Action that appears in multiple classes' right-click menus off a single publish?

Let me experiment on this a little. You should be able to publish once to multiple classes and have it show up instead of on just one.

Shawn, you may be thinking of him invoking the DIA once and trying to get it to fire across all the items or classes to which it applies. I think you're right there - that won't work. But I think he's just trying to get it to show up in the right-click menus of all the target classes he published to.

I don't want to fire it across multiple classes of items, but across multipe number of items of the same class.