How to add content to UL with LI

I have issue how to add additional content within UL.
UL already includes LI images. But These images have background defined within LI. Is semantically possible to put other background for other LI INSIDE the SAME UL?

Sample is like:

[code=php]
<ul>
<li><img src=”images/image1″ alt=”” /></li>
<li><img src=”images/image1″ alt=”” /></li>
<li><img src=”images/image1″ alt=”” /></li>
<li><img src=”images/image1″ alt=”” /></li>
<li><img src=”images/image1″ alt=”” /></li>
<li><img src=”images/image1″ alt=”” /></li>
<img src=”images/image2″ alt=”” />
<img src=”images/image2″ alt=”” />
<img src=”images/image2″ alt=”” />
</ul>
[/code]

I like to add to the [B]same[/B] UL [B]other[/B] LI image2 background.

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