spring security http antMatcher with multiple paths

Try the following approach:

http 
  .requestMatchers()
       .antMatchers("/lti1p/**","/lti2p/**")
       .and()
  .addFilterBefore(ltioAuthProviderProcessingFilter, UsernamePasswordAuthenticationFilter.class)
  .authorizeRequests().anyRequest().hasRole("LTI")
  .and().csrf().disable();