"Show only if / Don't show if" on plugin#25

It’d be great if the WP plugin had the “Show only if” / “Don’t show if” options.

I tried adding the widget to one page only but it isn’t possible without manually adding it to the php code.

Example:
“Show only if” URL contains/matches/equals = welcome/
“Show only if” user is logged in
“Show only if” time on site is/isnt’ greater/less than = 10 s/m/h

“Don’t show if” URL contains/matches/equals = pricing/