Apache directory listing only for specific IPs?

<Directory /path/to/your/dir>
  Options indexes
  order deny,allow
  deny from all
  allow from 192.168.1.101
</Directory>

If that doesn't do what you want (as nothing in the directory is not accessible period to anyone but the specified IP), you can do something that accomplishes what appears to be enabling indexes for a specific IP with mod_rewrite:

RewriteEngine on
RewriteCond %{REMOTE_ADDR} !^192\.168\.1\.101
RewriteRule ^/(index\.html)?$ /page_to_kick_people_looking_for_indexes_to.html [L]

Using the mod_authz_host in Apache 2 (or mod_access in Apache 1), you can limit access control to a Directory by IP address (or IP address range).

For example:

<Directory "/path/to/directory/">
Order allow,deny
Allow from XXX.XXX.XXX.XXX
Options Indexes
</Directory>

For more information see the Apache page for mod_authz_host.

If you create 2 <Directory /> entries you can show indexes for a specific IP or range and disable indexes for all others, like so:

<Directory "/path/to/directory">
    Order deny,allow
    Allow from all
    Options -Indexes
</Directory>

<Directory "/path/to/directory">
    Order allow,deny
    Allow from 192.168.1.101
    Options +Indexes
</Directory>

EDIT:

I now see that this also disables access to single files so it's still only accessible from one IP/range