instructions megamenu 1-10

Hello,
In moderate you wells it appears megamenu1-10, can I introduce a different icon in the menu user 3 with megamenu?

I cant actually understand your question very well but list image is defined in:

.hjt-megamenu-dropdown-panel-list
{
list-style-image:url('images/hjt-megamenu-list-bullet.png') ;
border-left: Solid 2px #443344;
margin:5px;
padding:0 0 0 20px;
}

that is in jquery.hjt.megamenu.css

You can do some css override:

.<class for some other place> .hjt-megamenu-dropdown-panel-list{...