Multisite advanced search by subsite (blog) id or subsite (blog) title

I have a wordpress multisite with 80 blogs with the following options
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Multi Site Options

• Enable global tables mode? –> Yes

Event Options

• Display global events on main blog? –> Yes
• Link sub-site events directly to sub-site? –> No
• Global event slug –> event

Location Options

• Locations on main blog? –> No
• Display global locations on main blog? –> Yes
• Link sub-site locations directly to sub-site? –> No
• Global location slug –> location

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I would like to use advanced search in order to restrict the events list searching by

• subsite (blog) id OR BETTER by
• subsite (blog) title.