如果不符合条件，则阻止复选框

// selecting each <input> of type=checkbox, iterating over the collection using the each() method:
$('input[type=checkbox]').each(function() {
  // retrieving a reference to the named attributes, converting the String of
  // "data-svcjurisdiction" to a two-part Array, using String.prototype.split():
  let svcjurisdiction = $(this).attr("data-svcjurisdiction").split(',');
  let rcpjurisdiction = $(this).attr("data-rcpjurisdiction");

  // here we update the 'disabled' property of the current <input> element; we use Array.prototype.some()
  // to test whether any of the Array-elements includes the string held in the rcpjurisdiction variable;
  // as Array.prototype.some() returns a Boolean to indicate that matches were found (true) or not-found
  // (false), we invert that property using the not-operator to disable or enable the element:
  $(this).prop('disabled', !svcjurisdiction.some((svc) => svc.includes(rcpjurisdiction)));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input class="services" value="13301686-3218159" data-rcpjurisdiction="Guernsey" data-svcjurisdiction="SCPB - LON, Guernsey" type="checkbox" title="Text to show" checked disabled/>
<!--
  adding a second <input> deliberately ensuring its "data-rcpjurisdiction" attribute-value is
  not present in the "data-svcjurisdiction" attribute:
-->
<input class="services" value="13301686-3218159" data-rcpjurisdiction="Jersey" data-svcjurisdiction="SCPB - LON, Guernsey" type="checkbox" title="Text to show" checked disabled/>

const D = document,
      get = (selector, context = D) => context.querySelector(selector),
      getAll = (selector, context = D) => [...context.querySelectorAll(selector)];

// selecting each <input> of type=checkbox, iterating over the collection using the Array.prototype.forEach() method:
getAll('input[type=checkbox').forEach(
  (elem) => {
    // using destructuring assignment to retrieve the two custom data-* attributes from
    // the elem.dataset Object:
    let {rcpjurisdiction, svcjurisdiction} = elem.dataset,

    // we split the data-svcjurisdiction attribute-value on the comma character,
    // using String.prototype.split() to generate an Array and we then iterate
    // over that Array using Array.prototype.map() to create a new Array:
    svc = svcjurisdiction.split(',').map(
      // we pass in the current Array of the Array of Strings ('str'),
      // and in the function body we use String.prototype.split() to
      // remove leading/trailing whitespace:
      (str) => str.trim()
    );
    // we then set the disabled property of the element to be the inverse
    // of the Boolean returned from Array.prototype.includes(), which returns
    // true of the string is included and false if it is not (we invert this
    // because you wish to enable the <input> if there is a match and we're
    // working with the disabled property):
    elem.disabled = !svc.includes(rcpjurisdiction);
  });

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input class="services" value="13301686-3218159" data-rcpjurisdiction="Guernsey" data-svcjurisdiction="SCPB - LON, Guernsey" type="checkbox" title="Text to show" checked disabled/>
<!--
  adding a second <input> deliberately ensuring its "data-rcpjurisdiction" attribute-value is
  not present in the "data-svcjurisdiction" attribute:
-->
<input class="services" value="13301686-3218159" data-rcpjurisdiction="Jersey" data-svcjurisdiction="SCPB - LON, Guernsey" type="checkbox" title="Text to show" checked disabled/>