#server config file
PerlModule Apache::AccessLimitNum
#access control directives
#use any authentication module AuthName SomeRealm Auth[DBM]UserFile /path/to/password/file PerlAccessHandler Apache::AccessLimitNum::handler PerlSetVar AccessLimitNum 100 PerlSetVar AccessLimitFile /path/to/limit/file
<Limit GET> require valid-user #or some such </Limit>
AccessLimitFile is a dbm file consisting of username = number value pairs. This file must be writeable by httpd server process.
Apache