You are going to need Tagalong and Pro Pack to do that.
Tagalong will give you custom map markers on a per-category basis. I hope to get a shortcode "by category" filter added before final 1.0 release, but it is not there yet.
Pro Pack has the only_with_tags shortcode attribute that allows you to display sub-sets of locations.
I am playing to shoot a screencast and post it on my site about how to do the Pro Pack maps that are restricted to a specific tag, like "sale locations" or "support locations" over the next couple of days.
All support for SLP is moving to the CSA website. Posts on that site now take precedence and get my attention first. Visit the new support forum here: